1 //===--- Expr.cpp - Expression AST Node Implementation --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Expr class and subclasses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/EvaluatedExprVisitor.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/Mangle.h"
23 #include "clang/AST/RecordLayout.h"
24 #include "clang/AST/StmtVisitor.h"
25 #include "clang/Basic/Builtins.h"
26 #include "clang/Basic/CharInfo.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "clang/Lex/Lexer.h"
30 #include "clang/Lex/LiteralSupport.h"
31 #include "clang/Sema/SemaDiagnostic.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/raw_ostream.h"
36 using namespace clang;
38 const Expr *Expr::getBestDynamicClassTypeExpr() const {
41 E = E->ignoreParenBaseCasts();
43 // Follow the RHS of a comma operator.
44 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
45 if (BO->getOpcode() == BO_Comma) {
51 // Step into initializer for materialized temporaries.
52 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
53 E = MTE->GetTemporaryExpr();
63 const CXXRecordDecl *Expr::getBestDynamicClassType() const {
64 const Expr *E = getBestDynamicClassTypeExpr();
65 QualType DerivedType = E->getType();
66 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
67 DerivedType = PTy->getPointeeType();
69 if (DerivedType->isDependentType())
72 const RecordType *Ty = DerivedType->castAs<RecordType>();
73 Decl *D = Ty->getDecl();
74 return cast<CXXRecordDecl>(D);
77 const Expr *Expr::skipRValueSubobjectAdjustments(
78 SmallVectorImpl<const Expr *> &CommaLHSs,
79 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
82 E = E->IgnoreParens();
84 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
85 if ((CE->getCastKind() == CK_DerivedToBase ||
86 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
87 E->getType()->isRecordType()) {
89 CXXRecordDecl *Derived
90 = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
91 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
95 if (CE->getCastKind() == CK_NoOp) {
99 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
100 if (!ME->isArrow()) {
101 assert(ME->getBase()->getType()->isRecordType());
102 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
103 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
105 Adjustments.push_back(SubobjectAdjustment(Field));
110 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
111 if (BO->getOpcode() == BO_PtrMemD) {
112 assert(BO->getRHS()->isRValue());
114 const MemberPointerType *MPT =
115 BO->getRHS()->getType()->getAs<MemberPointerType>();
116 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
118 } else if (BO->getOpcode() == BO_Comma) {
119 CommaLHSs.push_back(BO->getLHS());
131 /// isKnownToHaveBooleanValue - Return true if this is an integer expression
132 /// that is known to return 0 or 1. This happens for _Bool/bool expressions
133 /// but also int expressions which are produced by things like comparisons in
135 bool Expr::isKnownToHaveBooleanValue() const {
136 const Expr *E = IgnoreParens();
138 // If this value has _Bool type, it is obvious 0/1.
139 if (E->getType()->isBooleanType()) return true;
140 // If this is a non-scalar-integer type, we don't care enough to try.
141 if (!E->getType()->isIntegralOrEnumerationType()) return false;
143 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
144 switch (UO->getOpcode()) {
146 return UO->getSubExpr()->isKnownToHaveBooleanValue();
154 // Only look through implicit casts. If the user writes
155 // '(int) (a && b)' treat it as an arbitrary int.
156 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
157 return CE->getSubExpr()->isKnownToHaveBooleanValue();
159 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
160 switch (BO->getOpcode()) {
161 default: return false;
162 case BO_LT: // Relational operators.
166 case BO_EQ: // Equality operators.
168 case BO_LAnd: // AND operator.
169 case BO_LOr: // Logical OR operator.
172 case BO_And: // Bitwise AND operator.
173 case BO_Xor: // Bitwise XOR operator.
174 case BO_Or: // Bitwise OR operator.
175 // Handle things like (x==2)|(y==12).
176 return BO->getLHS()->isKnownToHaveBooleanValue() &&
177 BO->getRHS()->isKnownToHaveBooleanValue();
181 return BO->getRHS()->isKnownToHaveBooleanValue();
185 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
186 return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
187 CO->getFalseExpr()->isKnownToHaveBooleanValue();
192 // Amusing macro metaprogramming hack: check whether a class provides
193 // a more specific implementation of getExprLoc().
195 // See also Stmt.cpp:{getLocStart(),getLocEnd()}.
197 /// This implementation is used when a class provides a custom
198 /// implementation of getExprLoc.
199 template <class E, class T>
200 SourceLocation getExprLocImpl(const Expr *expr,
201 SourceLocation (T::*v)() const) {
202 return static_cast<const E*>(expr)->getExprLoc();
205 /// This implementation is used when a class doesn't provide
206 /// a custom implementation of getExprLoc. Overload resolution
207 /// should pick it over the implementation above because it's
208 /// more specialized according to function template partial ordering.
210 SourceLocation getExprLocImpl(const Expr *expr,
211 SourceLocation (Expr::*v)() const) {
212 return static_cast<const E*>(expr)->getLocStart();
216 SourceLocation Expr::getExprLoc() const {
217 switch (getStmtClass()) {
218 case Stmt::NoStmtClass: llvm_unreachable("statement without class");
219 #define ABSTRACT_STMT(type)
220 #define STMT(type, base) \
221 case Stmt::type##Class: break;
222 #define EXPR(type, base) \
223 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
224 #include "clang/AST/StmtNodes.inc"
226 llvm_unreachable("unknown expression kind");
229 //===----------------------------------------------------------------------===//
230 // Primary Expressions.
231 //===----------------------------------------------------------------------===//
233 /// Compute the type-, value-, and instantiation-dependence of a
234 /// declaration reference
235 /// based on the declaration being referenced.
236 static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
237 QualType T, bool &TypeDependent,
238 bool &ValueDependent,
239 bool &InstantiationDependent) {
240 TypeDependent = false;
241 ValueDependent = false;
242 InstantiationDependent = false;
244 // (TD) C++ [temp.dep.expr]p3:
245 // An id-expression is type-dependent if it contains:
249 // (VD) C++ [temp.dep.constexpr]p2:
250 // An identifier is value-dependent if it is:
252 // (TD) - an identifier that was declared with dependent type
253 // (VD) - a name declared with a dependent type,
254 if (T->isDependentType()) {
255 TypeDependent = true;
256 ValueDependent = true;
257 InstantiationDependent = true;
259 } else if (T->isInstantiationDependentType()) {
260 InstantiationDependent = true;
263 // (TD) - a conversion-function-id that specifies a dependent type
264 if (D->getDeclName().getNameKind()
265 == DeclarationName::CXXConversionFunctionName) {
266 QualType T = D->getDeclName().getCXXNameType();
267 if (T->isDependentType()) {
268 TypeDependent = true;
269 ValueDependent = true;
270 InstantiationDependent = true;
274 if (T->isInstantiationDependentType())
275 InstantiationDependent = true;
278 // (VD) - the name of a non-type template parameter,
279 if (isa<NonTypeTemplateParmDecl>(D)) {
280 ValueDependent = true;
281 InstantiationDependent = true;
285 // (VD) - a constant with integral or enumeration type and is
286 // initialized with an expression that is value-dependent.
287 // (VD) - a constant with literal type and is initialized with an
288 // expression that is value-dependent [C++11].
289 // (VD) - FIXME: Missing from the standard:
290 // - an entity with reference type and is initialized with an
291 // expression that is value-dependent [C++11]
292 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
293 if ((Ctx.getLangOpts().CPlusPlus11 ?
294 Var->getType()->isLiteralType(Ctx) :
295 Var->getType()->isIntegralOrEnumerationType()) &&
296 (Var->getType().isConstQualified() ||
297 Var->getType()->isReferenceType())) {
298 if (const Expr *Init = Var->getAnyInitializer())
299 if (Init->isValueDependent()) {
300 ValueDependent = true;
301 InstantiationDependent = true;
305 // (VD) - FIXME: Missing from the standard:
306 // - a member function or a static data member of the current
308 if (Var->isStaticDataMember() &&
309 Var->getDeclContext()->isDependentContext()) {
310 ValueDependent = true;
311 InstantiationDependent = true;
312 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
313 if (TInfo->getType()->isIncompleteArrayType())
314 TypeDependent = true;
320 // (VD) - FIXME: Missing from the standard:
321 // - a member function or a static data member of the current
323 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
324 ValueDependent = true;
325 InstantiationDependent = true;
329 void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
330 bool TypeDependent = false;
331 bool ValueDependent = false;
332 bool InstantiationDependent = false;
333 computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
334 ValueDependent, InstantiationDependent);
336 ExprBits.TypeDependent |= TypeDependent;
337 ExprBits.ValueDependent |= ValueDependent;
338 ExprBits.InstantiationDependent |= InstantiationDependent;
340 // Is the declaration a parameter pack?
341 if (getDecl()->isParameterPack())
342 ExprBits.ContainsUnexpandedParameterPack = true;
345 DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
346 NestedNameSpecifierLoc QualifierLoc,
347 SourceLocation TemplateKWLoc,
348 ValueDecl *D, bool RefersToEnclosingVariableOrCapture,
349 const DeclarationNameInfo &NameInfo,
351 const TemplateArgumentListInfo *TemplateArgs,
352 QualType T, ExprValueKind VK)
353 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
354 D(D), Loc(NameInfo.getLoc()), DNLoc(NameInfo.getInfo()) {
355 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
357 new (getTrailingObjects<NestedNameSpecifierLoc>())
358 NestedNameSpecifierLoc(QualifierLoc);
359 auto *NNS = QualifierLoc.getNestedNameSpecifier();
360 if (NNS->isInstantiationDependent())
361 ExprBits.InstantiationDependent = true;
362 if (NNS->containsUnexpandedParameterPack())
363 ExprBits.ContainsUnexpandedParameterPack = true;
365 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
367 *getTrailingObjects<NamedDecl *>() = FoundD;
368 DeclRefExprBits.HasTemplateKWAndArgsInfo
369 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
370 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
371 RefersToEnclosingVariableOrCapture;
373 bool Dependent = false;
374 bool InstantiationDependent = false;
375 bool ContainsUnexpandedParameterPack = false;
376 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
377 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
378 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
379 assert(!Dependent && "built a DeclRefExpr with dependent template args");
380 ExprBits.InstantiationDependent |= InstantiationDependent;
381 ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
382 } else if (TemplateKWLoc.isValid()) {
383 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
386 DeclRefExprBits.HadMultipleCandidates = 0;
388 computeDependence(Ctx);
391 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
392 NestedNameSpecifierLoc QualifierLoc,
393 SourceLocation TemplateKWLoc,
395 bool RefersToEnclosingVariableOrCapture,
396 SourceLocation NameLoc,
400 const TemplateArgumentListInfo *TemplateArgs) {
401 return Create(Context, QualifierLoc, TemplateKWLoc, D,
402 RefersToEnclosingVariableOrCapture,
403 DeclarationNameInfo(D->getDeclName(), NameLoc),
404 T, VK, FoundD, TemplateArgs);
407 DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
408 NestedNameSpecifierLoc QualifierLoc,
409 SourceLocation TemplateKWLoc,
411 bool RefersToEnclosingVariableOrCapture,
412 const DeclarationNameInfo &NameInfo,
416 const TemplateArgumentListInfo *TemplateArgs) {
417 // Filter out cases where the found Decl is the same as the value refenenced.
421 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
423 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
424 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
425 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
426 HasTemplateKWAndArgsInfo ? 1 : 0,
427 TemplateArgs ? TemplateArgs->size() : 0);
429 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
430 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
431 RefersToEnclosingVariableOrCapture,
432 NameInfo, FoundD, TemplateArgs, T, VK);
435 DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
438 bool HasTemplateKWAndArgsInfo,
439 unsigned NumTemplateArgs) {
440 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
442 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
443 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
444 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
446 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
447 return new (Mem) DeclRefExpr(EmptyShell());
450 SourceLocation DeclRefExpr::getBeginLoc() const {
452 return getQualifierLoc().getBeginLoc();
453 return getNameInfo().getLocStart();
455 SourceLocation DeclRefExpr::getEndLoc() const {
456 if (hasExplicitTemplateArgs())
457 return getRAngleLoc();
458 return getNameInfo().getLocEnd();
461 PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentType IT,
463 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
464 FNTy->isDependentType(), FNTy->isDependentType(),
465 FNTy->isInstantiationDependentType(),
466 /*ContainsUnexpandedParameterPack=*/false),
467 Loc(L), Type(IT), FnName(SL) {}
469 StringLiteral *PredefinedExpr::getFunctionName() {
470 return cast_or_null<StringLiteral>(FnName);
473 StringRef PredefinedExpr::getIdentTypeName(PredefinedExpr::IdentType IT) {
478 return "__FUNCTION__";
480 return "__FUNCDNAME__";
482 return "L__FUNCTION__";
484 return "__PRETTY_FUNCTION__";
486 return "__FUNCSIG__";
488 return "L__FUNCSIG__";
489 case PrettyFunctionNoVirtual:
492 llvm_unreachable("Unknown ident type for PredefinedExpr");
495 // FIXME: Maybe this should use DeclPrinter with a special "print predefined
496 // expr" policy instead.
497 std::string PredefinedExpr::ComputeName(IdentType IT, const Decl *CurrentDecl) {
498 ASTContext &Context = CurrentDecl->getASTContext();
500 if (IT == PredefinedExpr::FuncDName) {
501 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
502 std::unique_ptr<MangleContext> MC;
503 MC.reset(Context.createMangleContext());
505 if (MC->shouldMangleDeclName(ND)) {
506 SmallString<256> Buffer;
507 llvm::raw_svector_ostream Out(Buffer);
508 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
509 MC->mangleCXXCtor(CD, Ctor_Base, Out);
510 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
511 MC->mangleCXXDtor(DD, Dtor_Base, Out);
513 MC->mangleName(ND, Out);
515 if (!Buffer.empty() && Buffer.front() == '\01')
516 return Buffer.substr(1);
519 return ND->getIdentifier()->getName();
523 if (isa<BlockDecl>(CurrentDecl)) {
524 // For blocks we only emit something if it is enclosed in a function
525 // For top-level block we'd like to include the name of variable, but we
526 // don't have it at this point.
527 auto DC = CurrentDecl->getDeclContext();
528 if (DC->isFileContext())
531 SmallString<256> Buffer;
532 llvm::raw_svector_ostream Out(Buffer);
533 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
534 // For nested blocks, propagate up to the parent.
535 Out << ComputeName(IT, DCBlock);
536 else if (auto *DCDecl = dyn_cast<Decl>(DC))
537 Out << ComputeName(IT, DCDecl) << "_block_invoke";
540 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
541 if (IT != PrettyFunction && IT != PrettyFunctionNoVirtual &&
542 IT != FuncSig && IT != LFuncSig)
543 return FD->getNameAsString();
545 SmallString<256> Name;
546 llvm::raw_svector_ostream Out(Name);
548 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
549 if (MD->isVirtual() && IT != PrettyFunctionNoVirtual)
555 PrintingPolicy Policy(Context.getLangOpts());
557 llvm::raw_string_ostream POut(Proto);
559 const FunctionDecl *Decl = FD;
560 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
562 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
563 const FunctionProtoType *FT = nullptr;
564 if (FD->hasWrittenPrototype())
565 FT = dyn_cast<FunctionProtoType>(AFT);
567 if (IT == FuncSig || IT == LFuncSig) {
568 switch (AFT->getCallConv()) {
569 case CC_C: POut << "__cdecl "; break;
570 case CC_X86StdCall: POut << "__stdcall "; break;
571 case CC_X86FastCall: POut << "__fastcall "; break;
572 case CC_X86ThisCall: POut << "__thiscall "; break;
573 case CC_X86VectorCall: POut << "__vectorcall "; break;
574 case CC_X86RegCall: POut << "__regcall "; break;
575 // Only bother printing the conventions that MSVC knows about.
580 FD->printQualifiedName(POut, Policy);
584 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
586 POut << Decl->getParamDecl(i)->getType().stream(Policy);
589 if (FT->isVariadic()) {
590 if (FD->getNumParams()) POut << ", ";
592 } else if ((IT == FuncSig || IT == LFuncSig ||
593 !Context.getLangOpts().CPlusPlus) &&
594 !Decl->getNumParams()) {
600 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
601 assert(FT && "We must have a written prototype in this case.");
604 if (FT->isVolatile())
606 RefQualifierKind Ref = MD->getRefQualifier();
607 if (Ref == RQ_LValue)
609 else if (Ref == RQ_RValue)
613 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
615 const DeclContext *Ctx = FD->getDeclContext();
616 while (Ctx && isa<NamedDecl>(Ctx)) {
617 const ClassTemplateSpecializationDecl *Spec
618 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
619 if (Spec && !Spec->isExplicitSpecialization())
620 Specs.push_back(Spec);
621 Ctx = Ctx->getParent();
624 std::string TemplateParams;
625 llvm::raw_string_ostream TOut(TemplateParams);
626 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
628 const TemplateParameterList *Params
629 = (*I)->getSpecializedTemplate()->getTemplateParameters();
630 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
631 assert(Params->size() == Args.size());
632 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
633 StringRef Param = Params->getParam(i)->getName();
634 if (Param.empty()) continue;
635 TOut << Param << " = ";
636 Args.get(i).print(Policy, TOut);
641 FunctionTemplateSpecializationInfo *FSI
642 = FD->getTemplateSpecializationInfo();
643 if (FSI && !FSI->isExplicitSpecialization()) {
644 const TemplateParameterList* Params
645 = FSI->getTemplate()->getTemplateParameters();
646 const TemplateArgumentList* Args = FSI->TemplateArguments;
647 assert(Params->size() == Args->size());
648 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
649 StringRef Param = Params->getParam(i)->getName();
650 if (Param.empty()) continue;
651 TOut << Param << " = ";
652 Args->get(i).print(Policy, TOut);
658 if (!TemplateParams.empty()) {
659 // remove the trailing comma and space
660 TemplateParams.resize(TemplateParams.size() - 2);
661 POut << " [" << TemplateParams << "]";
666 // Print "auto" for all deduced return types. This includes C++1y return
667 // type deduction and lambdas. For trailing return types resolve the
668 // decltype expression. Otherwise print the real type when this is
669 // not a constructor or destructor.
670 if (isa<CXXMethodDecl>(FD) &&
671 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
672 Proto = "auto " + Proto;
673 else if (FT && FT->getReturnType()->getAs<DecltypeType>())
675 ->getAs<DecltypeType>()
676 ->getUnderlyingType()
677 .getAsStringInternal(Proto, Policy);
678 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
679 AFT->getReturnType().getAsStringInternal(Proto, Policy);
683 return Name.str().str();
685 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
686 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
687 // Skip to its enclosing function or method, but not its enclosing
689 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
690 const Decl *D = Decl::castFromDeclContext(DC);
691 return ComputeName(IT, D);
693 llvm_unreachable("CapturedDecl not inside a function or method");
695 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
696 SmallString<256> Name;
697 llvm::raw_svector_ostream Out(Name);
698 Out << (MD->isInstanceMethod() ? '-' : '+');
701 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
702 // a null check to avoid a crash.
703 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
706 if (const ObjCCategoryImplDecl *CID =
707 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
708 Out << '(' << *CID << ')';
711 MD->getSelector().print(Out);
714 return Name.str().str();
716 if (isa<TranslationUnitDecl>(CurrentDecl) && IT == PrettyFunction) {
717 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
723 void APNumericStorage::setIntValue(const ASTContext &C,
724 const llvm::APInt &Val) {
728 BitWidth = Val.getBitWidth();
729 unsigned NumWords = Val.getNumWords();
730 const uint64_t* Words = Val.getRawData();
732 pVal = new (C) uint64_t[NumWords];
733 std::copy(Words, Words + NumWords, pVal);
734 } else if (NumWords == 1)
740 IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
741 QualType type, SourceLocation l)
742 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
745 assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
746 assert(V.getBitWidth() == C.getIntWidth(type) &&
747 "Integer type is not the correct size for constant.");
752 IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
753 QualType type, SourceLocation l) {
754 return new (C) IntegerLiteral(C, V, type, l);
758 IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
759 return new (C) IntegerLiteral(Empty);
762 FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
763 QualType type, SourceLocation l,
765 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
767 Loc(l), Scale(Scale) {
768 assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral");
769 assert(V.getBitWidth() == C.getTypeInfo(type).Width &&
770 "Fixed point type is not the correct size for constant.");
774 FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
775 const llvm::APInt &V,
779 return new (C) FixedPointLiteral(C, V, type, l, Scale);
782 std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
783 // Currently the longest decimal number that can be printed is the max for an
784 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
785 // which is 43 characters.
787 FixedPointValueToString(
788 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale, Radix);
792 FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
793 bool isexact, QualType Type, SourceLocation L)
794 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
795 false, false), Loc(L) {
796 setSemantics(V.getSemantics());
797 FloatingLiteralBits.IsExact = isexact;
801 FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
802 : Expr(FloatingLiteralClass, Empty) {
803 setRawSemantics(IEEEhalf);
804 FloatingLiteralBits.IsExact = false;
808 FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
809 bool isexact, QualType Type, SourceLocation L) {
810 return new (C) FloatingLiteral(C, V, isexact, Type, L);
814 FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
815 return new (C) FloatingLiteral(C, Empty);
818 const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
819 switch(FloatingLiteralBits.Semantics) {
821 return llvm::APFloat::IEEEhalf();
823 return llvm::APFloat::IEEEsingle();
825 return llvm::APFloat::IEEEdouble();
826 case x87DoubleExtended:
827 return llvm::APFloat::x87DoubleExtended();
829 return llvm::APFloat::IEEEquad();
830 case PPCDoubleDouble:
831 return llvm::APFloat::PPCDoubleDouble();
833 llvm_unreachable("Unrecognised floating semantics");
836 void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
837 if (&Sem == &llvm::APFloat::IEEEhalf())
838 FloatingLiteralBits.Semantics = IEEEhalf;
839 else if (&Sem == &llvm::APFloat::IEEEsingle())
840 FloatingLiteralBits.Semantics = IEEEsingle;
841 else if (&Sem == &llvm::APFloat::IEEEdouble())
842 FloatingLiteralBits.Semantics = IEEEdouble;
843 else if (&Sem == &llvm::APFloat::x87DoubleExtended())
844 FloatingLiteralBits.Semantics = x87DoubleExtended;
845 else if (&Sem == &llvm::APFloat::IEEEquad())
846 FloatingLiteralBits.Semantics = IEEEquad;
847 else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
848 FloatingLiteralBits.Semantics = PPCDoubleDouble;
850 llvm_unreachable("Unknown floating semantics");
853 /// getValueAsApproximateDouble - This returns the value as an inaccurate
854 /// double. Note that this may cause loss of precision, but is useful for
855 /// debugging dumps, etc.
856 double FloatingLiteral::getValueAsApproximateDouble() const {
857 llvm::APFloat V = getValue();
859 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
861 return V.convertToDouble();
864 int StringLiteral::mapCharByteWidth(TargetInfo const &target,StringKind k) {
865 int CharByteWidth = 0;
869 CharByteWidth = target.getCharWidth();
872 CharByteWidth = target.getWCharWidth();
875 CharByteWidth = target.getChar16Width();
878 CharByteWidth = target.getChar32Width();
881 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
883 assert((CharByteWidth==1 || CharByteWidth==2 || CharByteWidth==4)
884 && "character byte widths supported are 1, 2, and 4 only");
885 return CharByteWidth;
888 StringLiteral *StringLiteral::Create(const ASTContext &C, StringRef Str,
889 StringKind Kind, bool Pascal, QualType Ty,
890 const SourceLocation *Loc,
892 assert(C.getAsConstantArrayType(Ty) &&
893 "StringLiteral must be of constant array type!");
895 // Allocate enough space for the StringLiteral plus an array of locations for
896 // any concatenated string tokens.
898 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
899 alignof(StringLiteral));
900 StringLiteral *SL = new (Mem) StringLiteral(Ty);
902 // OPTIMIZE: could allocate this appended to the StringLiteral.
903 SL->setString(C,Str,Kind,Pascal);
905 SL->TokLocs[0] = Loc[0];
906 SL->NumConcatenated = NumStrs;
909 memcpy(&SL->TokLocs[1], Loc+1, sizeof(SourceLocation)*(NumStrs-1));
913 StringLiteral *StringLiteral::CreateEmpty(const ASTContext &C,
916 C.Allocate(sizeof(StringLiteral) + sizeof(SourceLocation) * (NumStrs - 1),
917 alignof(StringLiteral));
919 new (Mem) StringLiteral(C.adjustStringLiteralBaseType(QualType()));
920 SL->CharByteWidth = 0;
922 SL->NumConcatenated = NumStrs;
926 void StringLiteral::outputString(raw_ostream &OS) const {
928 case Ascii: break; // no prefix.
929 case Wide: OS << 'L'; break;
930 case UTF8: OS << "u8"; break;
931 case UTF16: OS << 'u'; break;
932 case UTF32: OS << 'U'; break;
935 static const char Hex[] = "0123456789ABCDEF";
937 unsigned LastSlashX = getLength();
938 for (unsigned I = 0, N = getLength(); I != N; ++I) {
939 switch (uint32_t Char = getCodeUnit(I)) {
941 // FIXME: Convert UTF-8 back to codepoints before rendering.
943 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
944 // Leave invalid surrogates alone; we'll use \x for those.
945 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
947 uint32_t Trail = getCodeUnit(I + 1);
948 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
949 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
955 // If this is a wide string, output characters over 0xff using \x
956 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
957 // codepoint: use \x escapes for invalid codepoints.
958 if (getKind() == Wide ||
959 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
960 // FIXME: Is this the best way to print wchar_t?
963 while ((Char >> Shift) == 0)
965 for (/**/; Shift >= 0; Shift -= 4)
966 OS << Hex[(Char >> Shift) & 15];
973 << Hex[(Char >> 20) & 15]
974 << Hex[(Char >> 16) & 15];
977 OS << Hex[(Char >> 12) & 15]
978 << Hex[(Char >> 8) & 15]
979 << Hex[(Char >> 4) & 15]
980 << Hex[(Char >> 0) & 15];
984 // If we used \x... for the previous character, and this character is a
985 // hexadecimal digit, prevent it being slurped as part of the \x.
986 if (LastSlashX + 1 == I) {
988 case '0': case '1': case '2': case '3': case '4':
989 case '5': case '6': case '7': case '8': case '9':
990 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
991 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
996 assert(Char <= 0xff &&
997 "Characters above 0xff should already have been handled.");
999 if (isPrintable(Char))
1001 else // Output anything hard as an octal escape.
1003 << (char)('0' + ((Char >> 6) & 7))
1004 << (char)('0' + ((Char >> 3) & 7))
1005 << (char)('0' + ((Char >> 0) & 7));
1007 // Handle some common non-printable cases to make dumps prettier.
1008 case '\\': OS << "\\\\"; break;
1009 case '"': OS << "\\\""; break;
1010 case '\a': OS << "\\a"; break;
1011 case '\b': OS << "\\b"; break;
1012 case '\f': OS << "\\f"; break;
1013 case '\n': OS << "\\n"; break;
1014 case '\r': OS << "\\r"; break;
1015 case '\t': OS << "\\t"; break;
1016 case '\v': OS << "\\v"; break;
1022 void StringLiteral::setString(const ASTContext &C, StringRef Str,
1023 StringKind Kind, bool IsPascal) {
1024 //FIXME: we assume that the string data comes from a target that uses the same
1025 // code unit size and endianness for the type of string.
1027 this->IsPascal = IsPascal;
1029 CharByteWidth = mapCharByteWidth(C.getTargetInfo(),Kind);
1030 assert((Str.size()%CharByteWidth == 0)
1031 && "size of data must be multiple of CharByteWidth");
1032 Length = Str.size()/CharByteWidth;
1034 switch(CharByteWidth) {
1036 char *AStrData = new (C) char[Length];
1037 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1038 StrData.asChar = AStrData;
1042 uint16_t *AStrData = new (C) uint16_t[Length];
1043 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1044 StrData.asUInt16 = AStrData;
1048 uint32_t *AStrData = new (C) uint32_t[Length];
1049 std::memcpy(AStrData,Str.data(),Length*sizeof(*AStrData));
1050 StrData.asUInt32 = AStrData;
1054 llvm_unreachable("unsupported CharByteWidth");
1058 /// getLocationOfByte - Return a source location that points to the specified
1059 /// byte of this string literal.
1061 /// Strings are amazingly complex. They can be formed from multiple tokens and
1062 /// can have escape sequences in them in addition to the usual trigraph and
1063 /// escaped newline business. This routine handles this complexity.
1065 /// The *StartToken sets the first token to be searched in this function and
1066 /// the *StartTokenByteOffset is the byte offset of the first token. Before
1067 /// returning, it updates the *StartToken to the TokNo of the token being found
1068 /// and sets *StartTokenByteOffset to the byte offset of the token in the
1070 /// Using these two parameters can reduce the time complexity from O(n^2) to
1071 /// O(n) if one wants to get the location of byte for all the tokens in a
1075 StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1076 const LangOptions &Features,
1077 const TargetInfo &Target, unsigned *StartToken,
1078 unsigned *StartTokenByteOffset) const {
1079 assert((Kind == StringLiteral::Ascii || Kind == StringLiteral::UTF8) &&
1080 "Only narrow string literals are currently supported");
1082 // Loop over all of the tokens in this string until we find the one that
1083 // contains the byte we're looking for.
1085 unsigned StringOffset = 0;
1087 TokNo = *StartToken;
1088 if (StartTokenByteOffset) {
1089 StringOffset = *StartTokenByteOffset;
1090 ByteNo -= StringOffset;
1093 assert(TokNo < getNumConcatenated() && "Invalid byte number!");
1094 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1096 // Get the spelling of the string so that we can get the data that makes up
1097 // the string literal, not the identifier for the macro it is potentially
1098 // expanded through.
1099 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1101 // Re-lex the token to get its length and original spelling.
1102 std::pair<FileID, unsigned> LocInfo =
1103 SM.getDecomposedLoc(StrTokSpellingLoc);
1104 bool Invalid = false;
1105 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1107 if (StartTokenByteOffset != nullptr)
1108 *StartTokenByteOffset = StringOffset;
1109 if (StartToken != nullptr)
1110 *StartToken = TokNo;
1111 return StrTokSpellingLoc;
1114 const char *StrData = Buffer.data()+LocInfo.second;
1116 // Create a lexer starting at the beginning of this token.
1117 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1118 Buffer.begin(), StrData, Buffer.end());
1120 TheLexer.LexFromRawLexer(TheTok);
1122 // Use the StringLiteralParser to compute the length of the string in bytes.
1123 StringLiteralParser SLP(TheTok, SM, Features, Target);
1124 unsigned TokNumBytes = SLP.GetStringLength();
1126 // If the byte is in this token, return the location of the byte.
1127 if (ByteNo < TokNumBytes ||
1128 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1129 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1131 // Now that we know the offset of the token in the spelling, use the
1132 // preprocessor to get the offset in the original source.
1133 if (StartTokenByteOffset != nullptr)
1134 *StartTokenByteOffset = StringOffset;
1135 if (StartToken != nullptr)
1136 *StartToken = TokNo;
1137 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1140 // Move to the next string token.
1141 StringOffset += TokNumBytes;
1143 ByteNo -= TokNumBytes;
1149 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1150 /// corresponds to, e.g. "sizeof" or "[pre]++".
1151 StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1153 #define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1154 #include "clang/AST/OperationKinds.def"
1156 llvm_unreachable("Unknown unary operator");
1160 UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1162 default: llvm_unreachable("No unary operator for overloaded function");
1163 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1164 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1165 case OO_Amp: return UO_AddrOf;
1166 case OO_Star: return UO_Deref;
1167 case OO_Plus: return UO_Plus;
1168 case OO_Minus: return UO_Minus;
1169 case OO_Tilde: return UO_Not;
1170 case OO_Exclaim: return UO_LNot;
1171 case OO_Coawait: return UO_Coawait;
1175 OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1177 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1178 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1179 case UO_AddrOf: return OO_Amp;
1180 case UO_Deref: return OO_Star;
1181 case UO_Plus: return OO_Plus;
1182 case UO_Minus: return OO_Minus;
1183 case UO_Not: return OO_Tilde;
1184 case UO_LNot: return OO_Exclaim;
1185 case UO_Coawait: return OO_Coawait;
1186 default: return OO_None;
1191 //===----------------------------------------------------------------------===//
1192 // Postfix Operators.
1193 //===----------------------------------------------------------------------===//
1195 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1196 ArrayRef<Expr *> preargs, ArrayRef<Expr *> args, QualType t,
1197 ExprValueKind VK, SourceLocation rparenloc)
1198 : Expr(SC, t, VK, OK_Ordinary, fn->isTypeDependent(),
1199 fn->isValueDependent(), fn->isInstantiationDependent(),
1200 fn->containsUnexpandedParameterPack()),
1201 NumArgs(args.size()) {
1203 unsigned NumPreArgs = preargs.size();
1204 SubExprs = new (C) Stmt *[args.size()+PREARGS_START+NumPreArgs];
1206 for (unsigned i = 0; i != NumPreArgs; ++i) {
1207 updateDependenciesFromArg(preargs[i]);
1208 SubExprs[i+PREARGS_START] = preargs[i];
1210 for (unsigned i = 0; i != args.size(); ++i) {
1211 updateDependenciesFromArg(args[i]);
1212 SubExprs[i+PREARGS_START+NumPreArgs] = args[i];
1215 CallExprBits.NumPreArgs = NumPreArgs;
1216 RParenLoc = rparenloc;
1219 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, Expr *fn,
1220 ArrayRef<Expr *> args, QualType t, ExprValueKind VK,
1221 SourceLocation rparenloc)
1222 : CallExpr(C, SC, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {}
1224 CallExpr::CallExpr(const ASTContext &C, Expr *fn, ArrayRef<Expr *> args,
1225 QualType t, ExprValueKind VK, SourceLocation rparenloc)
1226 : CallExpr(C, CallExprClass, fn, ArrayRef<Expr *>(), args, t, VK, rparenloc) {
1229 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, EmptyShell Empty)
1230 : CallExpr(C, SC, /*NumPreArgs=*/0, Empty) {}
1232 CallExpr::CallExpr(const ASTContext &C, StmtClass SC, unsigned NumPreArgs,
1234 : Expr(SC, Empty), SubExprs(nullptr), NumArgs(0) {
1235 // FIXME: Why do we allocate this?
1236 SubExprs = new (C) Stmt*[PREARGS_START+NumPreArgs]();
1237 CallExprBits.NumPreArgs = NumPreArgs;
1240 void CallExpr::updateDependenciesFromArg(Expr *Arg) {
1241 if (Arg->isTypeDependent())
1242 ExprBits.TypeDependent = true;
1243 if (Arg->isValueDependent())
1244 ExprBits.ValueDependent = true;
1245 if (Arg->isInstantiationDependent())
1246 ExprBits.InstantiationDependent = true;
1247 if (Arg->containsUnexpandedParameterPack())
1248 ExprBits.ContainsUnexpandedParameterPack = true;
1251 FunctionDecl *CallExpr::getDirectCallee() {
1252 return dyn_cast_or_null<FunctionDecl>(getCalleeDecl());
1255 Decl *CallExpr::getCalleeDecl() {
1256 return getCallee()->getReferencedDeclOfCallee();
1259 Decl *Expr::getReferencedDeclOfCallee() {
1260 Expr *CEE = IgnoreParenImpCasts();
1262 while (SubstNonTypeTemplateParmExpr *NTTP
1263 = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1264 CEE = NTTP->getReplacement()->IgnoreParenCasts();
1267 // If we're calling a dereference, look at the pointer instead.
1268 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1269 if (BO->isPtrMemOp())
1270 CEE = BO->getRHS()->IgnoreParenCasts();
1271 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1272 if (UO->getOpcode() == UO_Deref)
1273 CEE = UO->getSubExpr()->IgnoreParenCasts();
1275 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1276 return DRE->getDecl();
1277 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1278 return ME->getMemberDecl();
1283 /// setNumArgs - This changes the number of arguments present in this call.
1284 /// Any orphaned expressions are deleted by this, and any new operands are set
1286 void CallExpr::setNumArgs(const ASTContext& C, unsigned NumArgs) {
1287 // No change, just return.
1288 if (NumArgs == getNumArgs()) return;
1290 // If shrinking # arguments, just delete the extras and forgot them.
1291 if (NumArgs < getNumArgs()) {
1292 this->NumArgs = NumArgs;
1296 // Otherwise, we are growing the # arguments. New an bigger argument array.
1297 unsigned NumPreArgs = getNumPreArgs();
1298 Stmt **NewSubExprs = new (C) Stmt*[NumArgs+PREARGS_START+NumPreArgs];
1300 for (unsigned i = 0; i != getNumArgs()+PREARGS_START+NumPreArgs; ++i)
1301 NewSubExprs[i] = SubExprs[i];
1302 // Null out new args.
1303 for (unsigned i = getNumArgs()+PREARGS_START+NumPreArgs;
1304 i != NumArgs+PREARGS_START+NumPreArgs; ++i)
1305 NewSubExprs[i] = nullptr;
1307 if (SubExprs) C.Deallocate(SubExprs);
1308 SubExprs = NewSubExprs;
1309 this->NumArgs = NumArgs;
1312 /// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
1314 unsigned CallExpr::getBuiltinCallee() const {
1315 // All simple function calls (e.g. func()) are implicitly cast to pointer to
1316 // function. As a result, we try and obtain the DeclRefExpr from the
1317 // ImplicitCastExpr.
1318 const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
1319 if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
1322 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
1326 const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
1330 if (!FDecl->getIdentifier())
1333 return FDecl->getBuiltinID();
1336 bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1337 if (unsigned BI = getBuiltinCallee())
1338 return Ctx.BuiltinInfo.isUnevaluated(BI);
1342 QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1343 const Expr *Callee = getCallee();
1344 QualType CalleeType = Callee->getType();
1345 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1346 CalleeType = FnTypePtr->getPointeeType();
1347 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1348 CalleeType = BPT->getPointeeType();
1349 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1350 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1353 // This should never be overloaded and so should never return null.
1354 CalleeType = Expr::findBoundMemberType(Callee);
1357 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1358 return FnType->getReturnType();
1361 SourceLocation CallExpr::getBeginLoc() const {
1362 if (isa<CXXOperatorCallExpr>(this))
1363 return cast<CXXOperatorCallExpr>(this)->getLocStart();
1365 SourceLocation begin = getCallee()->getLocStart();
1366 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1367 begin = getArg(0)->getLocStart();
1370 SourceLocation CallExpr::getEndLoc() const {
1371 if (isa<CXXOperatorCallExpr>(this))
1372 return cast<CXXOperatorCallExpr>(this)->getLocEnd();
1374 SourceLocation end = getRParenLoc();
1375 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1376 end = getArg(getNumArgs() - 1)->getLocEnd();
1380 OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1381 SourceLocation OperatorLoc,
1382 TypeSourceInfo *tsi,
1383 ArrayRef<OffsetOfNode> comps,
1384 ArrayRef<Expr*> exprs,
1385 SourceLocation RParenLoc) {
1386 void *Mem = C.Allocate(
1387 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1389 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1393 OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1394 unsigned numComps, unsigned numExprs) {
1396 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1397 return new (Mem) OffsetOfExpr(numComps, numExprs);
1400 OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1401 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1402 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1403 SourceLocation RParenLoc)
1404 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1405 /*TypeDependent=*/false,
1406 /*ValueDependent=*/tsi->getType()->isDependentType(),
1407 tsi->getType()->isInstantiationDependentType(),
1408 tsi->getType()->containsUnexpandedParameterPack()),
1409 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1410 NumComps(comps.size()), NumExprs(exprs.size())
1412 for (unsigned i = 0; i != comps.size(); ++i) {
1413 setComponent(i, comps[i]);
1416 for (unsigned i = 0; i != exprs.size(); ++i) {
1417 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1418 ExprBits.ValueDependent = true;
1419 if (exprs[i]->containsUnexpandedParameterPack())
1420 ExprBits.ContainsUnexpandedParameterPack = true;
1422 setIndexExpr(i, exprs[i]);
1426 IdentifierInfo *OffsetOfNode::getFieldName() const {
1427 assert(getKind() == Field || getKind() == Identifier);
1428 if (getKind() == Field)
1429 return getField()->getIdentifier();
1431 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1434 UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1435 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1436 SourceLocation op, SourceLocation rp)
1437 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1438 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1439 // Value-dependent if the argument is type-dependent.
1440 E->isTypeDependent(), E->isInstantiationDependent(),
1441 E->containsUnexpandedParameterPack()),
1442 OpLoc(op), RParenLoc(rp) {
1443 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1444 UnaryExprOrTypeTraitExprBits.IsType = false;
1447 // Check to see if we are in the situation where alignof(decl) should be
1448 // dependent because decl's alignment is dependent.
1449 if (ExprKind == UETT_AlignOf) {
1450 if (!isValueDependent() || !isInstantiationDependent()) {
1451 E = E->IgnoreParens();
1453 const ValueDecl *D = nullptr;
1454 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1456 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1457 D = ME->getMemberDecl();
1460 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1461 if (I->isAlignmentDependent()) {
1462 setValueDependent(true);
1463 setInstantiationDependent(true);
1472 MemberExpr *MemberExpr::Create(
1473 const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
1474 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1475 ValueDecl *memberdecl, DeclAccessPair founddecl,
1476 DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
1477 QualType ty, ExprValueKind vk, ExprObjectKind ok) {
1479 bool hasQualOrFound = (QualifierLoc ||
1480 founddecl.getDecl() != memberdecl ||
1481 founddecl.getAccess() != memberdecl->getAccess());
1483 bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
1485 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1486 TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
1487 HasTemplateKWAndArgsInfo ? 1 : 0,
1488 targs ? targs->size() : 0);
1490 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1491 MemberExpr *E = new (Mem)
1492 MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
1494 if (hasQualOrFound) {
1495 // FIXME: Wrong. We should be looking at the member declaration we found.
1496 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
1497 E->setValueDependent(true);
1498 E->setTypeDependent(true);
1499 E->setInstantiationDependent(true);
1501 else if (QualifierLoc &&
1502 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1503 E->setInstantiationDependent(true);
1505 E->HasQualifierOrFoundDecl = true;
1507 MemberExprNameQualifier *NQ =
1508 E->getTrailingObjects<MemberExprNameQualifier>();
1509 NQ->QualifierLoc = QualifierLoc;
1510 NQ->FoundDecl = founddecl;
1513 E->HasTemplateKWAndArgsInfo = (targs || TemplateKWLoc.isValid());
1516 bool Dependent = false;
1517 bool InstantiationDependent = false;
1518 bool ContainsUnexpandedParameterPack = false;
1519 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1520 TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
1521 Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
1522 if (InstantiationDependent)
1523 E->setInstantiationDependent(true);
1524 } else if (TemplateKWLoc.isValid()) {
1525 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1532 SourceLocation MemberExpr::getBeginLoc() const {
1533 if (isImplicitAccess()) {
1535 return getQualifierLoc().getBeginLoc();
1539 // FIXME: We don't want this to happen. Rather, we should be able to
1540 // detect all kinds of implicit accesses more cleanly.
1541 SourceLocation BaseStartLoc = getBase()->getLocStart();
1542 if (BaseStartLoc.isValid())
1543 return BaseStartLoc;
1546 SourceLocation MemberExpr::getEndLoc() const {
1547 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1548 if (hasExplicitTemplateArgs())
1549 EndLoc = getRAngleLoc();
1550 else if (EndLoc.isInvalid())
1551 EndLoc = getBase()->getLocEnd();
1555 bool CastExpr::CastConsistency() const {
1556 switch (getCastKind()) {
1557 case CK_DerivedToBase:
1558 case CK_UncheckedDerivedToBase:
1559 case CK_DerivedToBaseMemberPointer:
1560 case CK_BaseToDerived:
1561 case CK_BaseToDerivedMemberPointer:
1562 assert(!path_empty() && "Cast kind should have a base path!");
1565 case CK_CPointerToObjCPointerCast:
1566 assert(getType()->isObjCObjectPointerType());
1567 assert(getSubExpr()->getType()->isPointerType());
1568 goto CheckNoBasePath;
1570 case CK_BlockPointerToObjCPointerCast:
1571 assert(getType()->isObjCObjectPointerType());
1572 assert(getSubExpr()->getType()->isBlockPointerType());
1573 goto CheckNoBasePath;
1575 case CK_ReinterpretMemberPointer:
1576 assert(getType()->isMemberPointerType());
1577 assert(getSubExpr()->getType()->isMemberPointerType());
1578 goto CheckNoBasePath;
1581 // Arbitrary casts to C pointer types count as bitcasts.
1582 // Otherwise, we should only have block and ObjC pointer casts
1583 // here if they stay within the type kind.
1584 if (!getType()->isPointerType()) {
1585 assert(getType()->isObjCObjectPointerType() ==
1586 getSubExpr()->getType()->isObjCObjectPointerType());
1587 assert(getType()->isBlockPointerType() ==
1588 getSubExpr()->getType()->isBlockPointerType());
1590 goto CheckNoBasePath;
1592 case CK_AnyPointerToBlockPointerCast:
1593 assert(getType()->isBlockPointerType());
1594 assert(getSubExpr()->getType()->isAnyPointerType() &&
1595 !getSubExpr()->getType()->isBlockPointerType());
1596 goto CheckNoBasePath;
1598 case CK_CopyAndAutoreleaseBlockObject:
1599 assert(getType()->isBlockPointerType());
1600 assert(getSubExpr()->getType()->isBlockPointerType());
1601 goto CheckNoBasePath;
1603 case CK_FunctionToPointerDecay:
1604 assert(getType()->isPointerType());
1605 assert(getSubExpr()->getType()->isFunctionType());
1606 goto CheckNoBasePath;
1608 case CK_AddressSpaceConversion:
1609 assert(getType()->isPointerType() || getType()->isBlockPointerType());
1610 assert(getSubExpr()->getType()->isPointerType() ||
1611 getSubExpr()->getType()->isBlockPointerType());
1612 assert(getType()->getPointeeType().getAddressSpace() !=
1613 getSubExpr()->getType()->getPointeeType().getAddressSpace());
1615 // These should not have an inheritance path.
1618 case CK_ArrayToPointerDecay:
1619 case CK_NullToMemberPointer:
1620 case CK_NullToPointer:
1621 case CK_ConstructorConversion:
1622 case CK_IntegralToPointer:
1623 case CK_PointerToIntegral:
1625 case CK_VectorSplat:
1626 case CK_IntegralCast:
1627 case CK_BooleanToSignedIntegral:
1628 case CK_IntegralToFloating:
1629 case CK_FloatingToIntegral:
1630 case CK_FloatingCast:
1631 case CK_ObjCObjectLValueCast:
1632 case CK_FloatingRealToComplex:
1633 case CK_FloatingComplexToReal:
1634 case CK_FloatingComplexCast:
1635 case CK_FloatingComplexToIntegralComplex:
1636 case CK_IntegralRealToComplex:
1637 case CK_IntegralComplexToReal:
1638 case CK_IntegralComplexCast:
1639 case CK_IntegralComplexToFloatingComplex:
1640 case CK_ARCProduceObject:
1641 case CK_ARCConsumeObject:
1642 case CK_ARCReclaimReturnedObject:
1643 case CK_ARCExtendBlockObject:
1644 case CK_ZeroToOCLEvent:
1645 case CK_ZeroToOCLQueue:
1646 case CK_IntToOCLSampler:
1647 assert(!getType()->isBooleanType() && "unheralded conversion to bool");
1648 goto CheckNoBasePath;
1651 case CK_LValueToRValue:
1653 case CK_AtomicToNonAtomic:
1654 case CK_NonAtomicToAtomic:
1655 case CK_PointerToBoolean:
1656 case CK_IntegralToBoolean:
1657 case CK_FloatingToBoolean:
1658 case CK_MemberPointerToBoolean:
1659 case CK_FloatingComplexToBoolean:
1660 case CK_IntegralComplexToBoolean:
1661 case CK_LValueBitCast: // -> bool&
1662 case CK_UserDefinedConversion: // operator bool()
1663 case CK_BuiltinFnToFnPtr:
1665 assert(path_empty() && "Cast kind should not have a base path!");
1671 const char *CastExpr::getCastKindName(CastKind CK) {
1673 #define CAST_OPERATION(Name) case CK_##Name: return #Name;
1674 #include "clang/AST/OperationKinds.def"
1676 llvm_unreachable("Unhandled cast kind!");
1680 const Expr *skipImplicitTemporary(const Expr *E) {
1681 // Skip through reference binding to temporary.
1682 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1683 E = Materialize->GetTemporaryExpr();
1685 // Skip any temporary bindings; they're implicit.
1686 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1687 E = Binder->getSubExpr();
1693 Expr *CastExpr::getSubExprAsWritten() {
1694 const Expr *SubExpr = nullptr;
1695 const CastExpr *E = this;
1697 SubExpr = skipImplicitTemporary(E->getSubExpr());
1699 // Conversions by constructor and conversion functions have a
1700 // subexpression describing the call; strip it off.
1701 if (E->getCastKind() == CK_ConstructorConversion)
1703 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
1704 else if (E->getCastKind() == CK_UserDefinedConversion) {
1705 assert((isa<CXXMemberCallExpr>(SubExpr) ||
1706 isa<BlockExpr>(SubExpr)) &&
1707 "Unexpected SubExpr for CK_UserDefinedConversion.");
1708 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1709 SubExpr = MCE->getImplicitObjectArgument();
1712 // If the subexpression we're left with is an implicit cast, look
1713 // through that, too.
1714 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1716 return const_cast<Expr*>(SubExpr);
1719 NamedDecl *CastExpr::getConversionFunction() const {
1720 const Expr *SubExpr = nullptr;
1722 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1723 SubExpr = skipImplicitTemporary(E->getSubExpr());
1725 if (E->getCastKind() == CK_ConstructorConversion)
1726 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1728 if (E->getCastKind() == CK_UserDefinedConversion) {
1729 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1730 return MCE->getMethodDecl();
1737 CastExpr::BasePathSizeTy *CastExpr::BasePathSize() {
1738 assert(!path_empty());
1739 switch (getStmtClass()) {
1740 #define ABSTRACT_STMT(x)
1741 #define CASTEXPR(Type, Base) \
1742 case Stmt::Type##Class: \
1743 return static_cast<Type *>(this) \
1744 ->getTrailingObjects<CastExpr::BasePathSizeTy>();
1745 #define STMT(Type, Base)
1746 #include "clang/AST/StmtNodes.inc"
1748 llvm_unreachable("non-cast expressions not possible here");
1752 CXXBaseSpecifier **CastExpr::path_buffer() {
1753 switch (getStmtClass()) {
1754 #define ABSTRACT_STMT(x)
1755 #define CASTEXPR(Type, Base) \
1756 case Stmt::Type##Class: \
1757 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1758 #define STMT(Type, Base)
1759 #include "clang/AST/StmtNodes.inc"
1761 llvm_unreachable("non-cast expressions not possible here");
1765 const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1767 auto RD = unionType->castAs<RecordType>()->getDecl();
1768 return getTargetFieldForToUnionCast(RD, opType);
1771 const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1773 auto &Ctx = RD->getASTContext();
1774 RecordDecl::field_iterator Field, FieldEnd;
1775 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1776 Field != FieldEnd; ++Field) {
1777 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1778 !Field->isUnnamedBitfield()) {
1785 ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1786 CastKind Kind, Expr *Operand,
1787 const CXXCastPath *BasePath,
1789 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1791 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1792 PathSize ? 1 : 0, PathSize));
1793 ImplicitCastExpr *E =
1794 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1796 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1797 E->getTrailingObjects<CXXBaseSpecifier *>());
1801 ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1802 unsigned PathSize) {
1804 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1805 PathSize ? 1 : 0, PathSize));
1806 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1810 CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1811 ExprValueKind VK, CastKind K, Expr *Op,
1812 const CXXCastPath *BasePath,
1813 TypeSourceInfo *WrittenTy,
1814 SourceLocation L, SourceLocation R) {
1815 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1817 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1818 PathSize ? 1 : 0, PathSize));
1820 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1822 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1823 E->getTrailingObjects<CXXBaseSpecifier *>());
1827 CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1828 unsigned PathSize) {
1830 C.Allocate(totalSizeToAlloc<CastExpr::BasePathSizeTy, CXXBaseSpecifier *>(
1831 PathSize ? 1 : 0, PathSize));
1832 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1835 /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1836 /// corresponds to, e.g. "<<=".
1837 StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1839 #define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1840 #include "clang/AST/OperationKinds.def"
1842 llvm_unreachable("Invalid OpCode!");
1846 BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
1848 default: llvm_unreachable("Not an overloadable binary operator");
1849 case OO_Plus: return BO_Add;
1850 case OO_Minus: return BO_Sub;
1851 case OO_Star: return BO_Mul;
1852 case OO_Slash: return BO_Div;
1853 case OO_Percent: return BO_Rem;
1854 case OO_Caret: return BO_Xor;
1855 case OO_Amp: return BO_And;
1856 case OO_Pipe: return BO_Or;
1857 case OO_Equal: return BO_Assign;
1858 case OO_Spaceship: return BO_Cmp;
1859 case OO_Less: return BO_LT;
1860 case OO_Greater: return BO_GT;
1861 case OO_PlusEqual: return BO_AddAssign;
1862 case OO_MinusEqual: return BO_SubAssign;
1863 case OO_StarEqual: return BO_MulAssign;
1864 case OO_SlashEqual: return BO_DivAssign;
1865 case OO_PercentEqual: return BO_RemAssign;
1866 case OO_CaretEqual: return BO_XorAssign;
1867 case OO_AmpEqual: return BO_AndAssign;
1868 case OO_PipeEqual: return BO_OrAssign;
1869 case OO_LessLess: return BO_Shl;
1870 case OO_GreaterGreater: return BO_Shr;
1871 case OO_LessLessEqual: return BO_ShlAssign;
1872 case OO_GreaterGreaterEqual: return BO_ShrAssign;
1873 case OO_EqualEqual: return BO_EQ;
1874 case OO_ExclaimEqual: return BO_NE;
1875 case OO_LessEqual: return BO_LE;
1876 case OO_GreaterEqual: return BO_GE;
1877 case OO_AmpAmp: return BO_LAnd;
1878 case OO_PipePipe: return BO_LOr;
1879 case OO_Comma: return BO_Comma;
1880 case OO_ArrowStar: return BO_PtrMemI;
1884 OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
1885 static const OverloadedOperatorKind OverOps[] = {
1886 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
1887 OO_Star, OO_Slash, OO_Percent,
1889 OO_LessLess, OO_GreaterGreater,
1891 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
1892 OO_EqualEqual, OO_ExclaimEqual,
1898 OO_Equal, OO_StarEqual,
1899 OO_SlashEqual, OO_PercentEqual,
1900 OO_PlusEqual, OO_MinusEqual,
1901 OO_LessLessEqual, OO_GreaterGreaterEqual,
1902 OO_AmpEqual, OO_CaretEqual,
1906 return OverOps[Opc];
1909 bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
1911 Expr *LHS, Expr *RHS) {
1915 // Check that we have one pointer and one integer operand.
1917 if (LHS->getType()->isPointerType()) {
1918 if (!RHS->getType()->isIntegerType())
1921 } else if (RHS->getType()->isPointerType()) {
1922 if (!LHS->getType()->isIntegerType())
1929 // Check that the pointer is a nullptr.
1930 if (!PExp->IgnoreParenCasts()
1931 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
1934 // Check that the pointee type is char-sized.
1935 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
1936 if (!PTy || !PTy->getPointeeType()->isCharType())
1941 InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
1942 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
1943 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
1945 InitExprs(C, initExprs.size()),
1946 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
1948 sawArrayRangeDesignator(false);
1949 for (unsigned I = 0; I != initExprs.size(); ++I) {
1950 if (initExprs[I]->isTypeDependent())
1951 ExprBits.TypeDependent = true;
1952 if (initExprs[I]->isValueDependent())
1953 ExprBits.ValueDependent = true;
1954 if (initExprs[I]->isInstantiationDependent())
1955 ExprBits.InstantiationDependent = true;
1956 if (initExprs[I]->containsUnexpandedParameterPack())
1957 ExprBits.ContainsUnexpandedParameterPack = true;
1960 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
1963 void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
1964 if (NumInits > InitExprs.size())
1965 InitExprs.reserve(C, NumInits);
1968 void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
1969 InitExprs.resize(C, NumInits, nullptr);
1972 Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
1973 if (Init >= InitExprs.size()) {
1974 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
1975 setInit(Init, expr);
1979 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
1980 setInit(Init, expr);
1984 void InitListExpr::setArrayFiller(Expr *filler) {
1985 assert(!hasArrayFiller() && "Filler already set!");
1986 ArrayFillerOrUnionFieldInit = filler;
1987 // Fill out any "holes" in the array due to designated initializers.
1988 Expr **inits = getInits();
1989 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
1990 if (inits[i] == nullptr)
1994 bool InitListExpr::isStringLiteralInit() const {
1995 if (getNumInits() != 1)
1997 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
1998 if (!AT || !AT->getElementType()->isIntegerType())
2000 // It is possible for getInit() to return null.
2001 const Expr *Init = getInit(0);
2004 Init = Init->IgnoreParens();
2005 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2008 bool InitListExpr::isTransparent() const {
2009 assert(isSemanticForm() && "syntactic form never semantically transparent");
2011 // A glvalue InitListExpr is always just sugar.
2013 assert(getNumInits() == 1 && "multiple inits in glvalue init list");
2017 // Otherwise, we're sugar if and only if we have exactly one initializer that
2018 // is of the same type.
2019 if (getNumInits() != 1 || !getInit(0))
2022 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2023 // transparent struct copy.
2024 if (!getInit(0)->isRValue() && getType()->isRecordType())
2027 return getType().getCanonicalType() ==
2028 getInit(0)->getType().getCanonicalType();
2031 bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2032 assert(isSyntacticForm() && "only test syntactic form as zero initializer");
2034 if (LangOpts.CPlusPlus || getNumInits() != 1) {
2038 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0));
2039 return Lit && Lit->getValue() == 0;
2042 SourceLocation InitListExpr::getBeginLoc() const {
2043 if (InitListExpr *SyntacticForm = getSyntacticForm())
2044 return SyntacticForm->getLocStart();
2045 SourceLocation Beg = LBraceLoc;
2046 if (Beg.isInvalid()) {
2047 // Find the first non-null initializer.
2048 for (InitExprsTy::const_iterator I = InitExprs.begin(),
2049 E = InitExprs.end();
2052 Beg = S->getLocStart();
2060 SourceLocation InitListExpr::getEndLoc() const {
2061 if (InitListExpr *SyntacticForm = getSyntacticForm())
2062 return SyntacticForm->getLocEnd();
2063 SourceLocation End = RBraceLoc;
2064 if (End.isInvalid()) {
2065 // Find the first non-null initializer from the end.
2066 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2067 E = InitExprs.rend();
2070 End = S->getLocEnd();
2078 /// getFunctionType - Return the underlying function type for this block.
2080 const FunctionProtoType *BlockExpr::getFunctionType() const {
2081 // The block pointer is never sugared, but the function type might be.
2082 return cast<BlockPointerType>(getType())
2083 ->getPointeeType()->castAs<FunctionProtoType>();
2086 SourceLocation BlockExpr::getCaretLocation() const {
2087 return TheBlock->getCaretLocation();
2089 const Stmt *BlockExpr::getBody() const {
2090 return TheBlock->getBody();
2092 Stmt *BlockExpr::getBody() {
2093 return TheBlock->getBody();
2097 //===----------------------------------------------------------------------===//
2098 // Generic Expression Routines
2099 //===----------------------------------------------------------------------===//
2101 /// isUnusedResultAWarning - Return true if this immediate expression should
2102 /// be warned about if the result is unused. If so, fill in Loc and Ranges
2103 /// with location to warn on and the source range[s] to report with the
2105 bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2106 SourceRange &R1, SourceRange &R2,
2107 ASTContext &Ctx) const {
2108 // Don't warn if the expr is type dependent. The type could end up
2109 // instantiating to void.
2110 if (isTypeDependent())
2113 switch (getStmtClass()) {
2115 if (getType()->isVoidType())
2119 R1 = getSourceRange();
2121 case ParenExprClass:
2122 return cast<ParenExpr>(this)->getSubExpr()->
2123 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2124 case GenericSelectionExprClass:
2125 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2126 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2127 case CoawaitExprClass:
2128 case CoyieldExprClass:
2129 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
2130 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2131 case ChooseExprClass:
2132 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2133 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2134 case UnaryOperatorClass: {
2135 const UnaryOperator *UO = cast<UnaryOperator>(this);
2137 switch (UO->getOpcode()) {
2146 // This is just the 'operator co_await' call inside the guts of a
2147 // dependent co_await call.
2151 case UO_PreDec: // ++/--
2152 return false; // Not a warning.
2155 // accessing a piece of a volatile complex is a side-effect.
2156 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2157 .isVolatileQualified())
2161 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2164 Loc = UO->getOperatorLoc();
2165 R1 = UO->getSubExpr()->getSourceRange();
2168 case BinaryOperatorClass: {
2169 const BinaryOperator *BO = cast<BinaryOperator>(this);
2170 switch (BO->getOpcode()) {
2173 // Consider the RHS of comma for side effects. LHS was checked by
2174 // Sema::CheckCommaOperands.
2176 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2177 // lvalue-ness) of an assignment written in a macro.
2178 if (IntegerLiteral *IE =
2179 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2180 if (IE->getValue() == 0)
2182 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2183 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2186 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2187 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2191 if (BO->isAssignmentOp())
2194 Loc = BO->getOperatorLoc();
2195 R1 = BO->getLHS()->getSourceRange();
2196 R2 = BO->getRHS()->getSourceRange();
2199 case CompoundAssignOperatorClass:
2200 case VAArgExprClass:
2201 case AtomicExprClass:
2204 case ConditionalOperatorClass: {
2205 // If only one of the LHS or RHS is a warning, the operator might
2206 // be being used for control flow. Only warn if both the LHS and
2207 // RHS are warnings.
2208 const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
2209 if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2213 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2216 case MemberExprClass:
2218 Loc = cast<MemberExpr>(this)->getMemberLoc();
2219 R1 = SourceRange(Loc, Loc);
2220 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2223 case ArraySubscriptExprClass:
2225 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2226 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2227 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2230 case CXXOperatorCallExprClass: {
2231 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2232 // overloads as there is no reasonable way to define these such that they
2233 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2234 // warning: operators == and != are commonly typo'ed, and so warning on them
2235 // provides additional value as well. If this list is updated,
2236 // DiagnoseUnusedComparison should be as well.
2237 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2238 switch (Op->getOperator()) {
2242 case OO_ExclaimEqual:
2245 case OO_GreaterEqual:
2247 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2248 Op->getCallReturnType(Ctx)->isVoidType())
2251 Loc = Op->getOperatorLoc();
2252 R1 = Op->getSourceRange();
2256 // Fallthrough for generic call handling.
2260 case CXXMemberCallExprClass:
2261 case UserDefinedLiteralClass: {
2262 // If this is a direct call, get the callee.
2263 const CallExpr *CE = cast<CallExpr>(this);
2264 if (const Decl *FD = CE->getCalleeDecl()) {
2265 const FunctionDecl *Func = dyn_cast<FunctionDecl>(FD);
2266 bool HasWarnUnusedResultAttr = Func ? Func->hasUnusedResultAttr()
2267 : FD->hasAttr<WarnUnusedResultAttr>();
2269 // If the callee has attribute pure, const, or warn_unused_result, warn
2270 // about it. void foo() { strlen("bar"); } should warn.
2272 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2273 // updated to match for QoI.
2274 if (HasWarnUnusedResultAttr ||
2275 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2277 Loc = CE->getCallee()->getLocStart();
2278 R1 = CE->getCallee()->getSourceRange();
2280 if (unsigned NumArgs = CE->getNumArgs())
2281 R2 = SourceRange(CE->getArg(0)->getLocStart(),
2282 CE->getArg(NumArgs-1)->getLocEnd());
2289 // If we don't know precisely what we're looking at, let's not warn.
2290 case UnresolvedLookupExprClass:
2291 case CXXUnresolvedConstructExprClass:
2294 case CXXTemporaryObjectExprClass:
2295 case CXXConstructExprClass: {
2296 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2297 if (Type->hasAttr<WarnUnusedAttr>()) {
2299 Loc = getLocStart();
2300 R1 = getSourceRange();
2307 case ObjCMessageExprClass: {
2308 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2309 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2310 ME->isInstanceMessage() &&
2311 !ME->getType()->isVoidType() &&
2312 ME->getMethodFamily() == OMF_init) {
2315 R1 = ME->getSourceRange();
2319 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2320 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2329 case ObjCPropertyRefExprClass:
2332 R1 = getSourceRange();
2335 case PseudoObjectExprClass: {
2336 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2338 // Only complain about things that have the form of a getter.
2339 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2340 isa<BinaryOperator>(PO->getSyntacticForm()))
2345 R1 = getSourceRange();
2349 case StmtExprClass: {
2350 // Statement exprs don't logically have side effects themselves, but are
2351 // sometimes used in macros in ways that give them a type that is unused.
2352 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2353 // however, if the result of the stmt expr is dead, we don't want to emit a
2355 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2356 if (!CS->body_empty()) {
2357 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2358 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2359 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2360 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2361 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2364 if (getType()->isVoidType())
2367 Loc = cast<StmtExpr>(this)->getLParenLoc();
2368 R1 = getSourceRange();
2371 case CXXFunctionalCastExprClass:
2372 case CStyleCastExprClass: {
2373 // Ignore an explicit cast to void unless the operand is a non-trivial
2375 const CastExpr *CE = cast<CastExpr>(this);
2376 if (CE->getCastKind() == CK_ToVoid) {
2377 if (CE->getSubExpr()->isGLValue() &&
2378 CE->getSubExpr()->getType().isVolatileQualified()) {
2379 const DeclRefExpr *DRE =
2380 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2381 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2382 cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
2383 !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
2384 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2391 // If this is a cast to a constructor conversion, check the operand.
2392 // Otherwise, the result of the cast is unused.
2393 if (CE->getCastKind() == CK_ConstructorConversion)
2394 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2397 if (const CXXFunctionalCastExpr *CXXCE =
2398 dyn_cast<CXXFunctionalCastExpr>(this)) {
2399 Loc = CXXCE->getLocStart();
2400 R1 = CXXCE->getSubExpr()->getSourceRange();
2402 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2403 Loc = CStyleCE->getLParenLoc();
2404 R1 = CStyleCE->getSubExpr()->getSourceRange();
2408 case ImplicitCastExprClass: {
2409 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2411 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2412 if (ICE->getCastKind() == CK_LValueToRValue &&
2413 ICE->getSubExpr()->getType().isVolatileQualified())
2416 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2418 case CXXDefaultArgExprClass:
2419 return (cast<CXXDefaultArgExpr>(this)
2420 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2421 case CXXDefaultInitExprClass:
2422 return (cast<CXXDefaultInitExpr>(this)
2423 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2425 case CXXNewExprClass:
2426 // FIXME: In theory, there might be new expressions that don't have side
2427 // effects (e.g. a placement new with an uninitialized POD).
2428 case CXXDeleteExprClass:
2430 case MaterializeTemporaryExprClass:
2431 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2432 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2433 case CXXBindTemporaryExprClass:
2434 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2435 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2436 case ExprWithCleanupsClass:
2437 return cast<ExprWithCleanups>(this)->getSubExpr()
2438 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2442 /// isOBJCGCCandidate - Check if an expression is objc gc'able.
2443 /// returns true, if it is; false otherwise.
2444 bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2445 const Expr *E = IgnoreParens();
2446 switch (E->getStmtClass()) {
2449 case ObjCIvarRefExprClass:
2451 case Expr::UnaryOperatorClass:
2452 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2453 case ImplicitCastExprClass:
2454 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2455 case MaterializeTemporaryExprClass:
2456 return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
2457 ->isOBJCGCCandidate(Ctx);
2458 case CStyleCastExprClass:
2459 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2460 case DeclRefExprClass: {
2461 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2463 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2464 if (VD->hasGlobalStorage())
2466 QualType T = VD->getType();
2467 // dereferencing to a pointer is always a gc'able candidate,
2468 // unless it is __weak.
2469 return T->isPointerType() &&
2470 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2474 case MemberExprClass: {
2475 const MemberExpr *M = cast<MemberExpr>(E);
2476 return M->getBase()->isOBJCGCCandidate(Ctx);
2478 case ArraySubscriptExprClass:
2479 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2483 bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2484 if (isTypeDependent())
2486 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2489 QualType Expr::findBoundMemberType(const Expr *expr) {
2490 assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
2492 // Bound member expressions are always one of these possibilities:
2493 // x->m x.m x->*y x.*y
2494 // (possibly parenthesized)
2496 expr = expr->IgnoreParens();
2497 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2498 assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
2499 return mem->getMemberDecl()->getType();
2502 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2503 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2505 assert(type->isFunctionType());
2509 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
2513 Expr* Expr::IgnoreParens() {
2516 if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
2517 E = P->getSubExpr();
2520 if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
2521 if (P->getOpcode() == UO_Extension) {
2522 E = P->getSubExpr();
2526 if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
2527 if (!P->isResultDependent()) {
2528 E = P->getResultExpr();
2532 if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
2533 if (!P->isConditionDependent()) {
2534 E = P->getChosenSubExpr();
2542 /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr
2543 /// or CastExprs or ImplicitCastExprs, returning their operand.
2544 Expr *Expr::IgnoreParenCasts() {
2547 E = E->IgnoreParens();
2548 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2549 E = P->getSubExpr();
2552 if (MaterializeTemporaryExpr *Materialize
2553 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2554 E = Materialize->GetTemporaryExpr();
2557 if (SubstNonTypeTemplateParmExpr *NTTP
2558 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2559 E = NTTP->getReplacement();
2566 Expr *Expr::IgnoreCasts() {
2569 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2570 E = P->getSubExpr();
2573 if (MaterializeTemporaryExpr *Materialize
2574 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2575 E = Materialize->GetTemporaryExpr();
2578 if (SubstNonTypeTemplateParmExpr *NTTP
2579 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2580 E = NTTP->getReplacement();
2587 /// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
2588 /// casts. This is intended purely as a temporary workaround for code
2589 /// that hasn't yet been rewritten to do the right thing about those
2590 /// casts, and may disappear along with the last internal use.
2591 Expr *Expr::IgnoreParenLValueCasts() {
2594 E = E->IgnoreParens();
2595 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2596 if (P->getCastKind() == CK_LValueToRValue) {
2597 E = P->getSubExpr();
2600 } else if (MaterializeTemporaryExpr *Materialize
2601 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2602 E = Materialize->GetTemporaryExpr();
2604 } else if (SubstNonTypeTemplateParmExpr *NTTP
2605 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2606 E = NTTP->getReplacement();
2614 Expr *Expr::ignoreParenBaseCasts() {
2617 E = E->IgnoreParens();
2618 if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
2619 if (CE->getCastKind() == CK_DerivedToBase ||
2620 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2621 CE->getCastKind() == CK_NoOp) {
2622 E = CE->getSubExpr();
2631 Expr *Expr::IgnoreParenImpCasts() {
2634 E = E->IgnoreParens();
2635 if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
2636 E = P->getSubExpr();
2639 if (MaterializeTemporaryExpr *Materialize
2640 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2641 E = Materialize->GetTemporaryExpr();
2644 if (SubstNonTypeTemplateParmExpr *NTTP
2645 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2646 E = NTTP->getReplacement();
2653 Expr *Expr::IgnoreConversionOperator() {
2654 if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2655 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2656 return MCE->getImplicitObjectArgument();
2661 /// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
2662 /// value (including ptr->int casts of the same size). Strip off any
2663 /// ParenExpr or CastExprs, returning their operand.
2664 Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
2667 E = E->IgnoreParens();
2669 if (CastExpr *P = dyn_cast<CastExpr>(E)) {
2670 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2671 // ptr<->int casts of the same width. We also ignore all identity casts.
2672 Expr *SE = P->getSubExpr();
2674 if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
2679 if ((E->getType()->isPointerType() ||
2680 E->getType()->isIntegralType(Ctx)) &&
2681 (SE->getType()->isPointerType() ||
2682 SE->getType()->isIntegralType(Ctx)) &&
2683 Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
2689 if (SubstNonTypeTemplateParmExpr *NTTP
2690 = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
2691 E = NTTP->getReplacement();
2699 bool Expr::isDefaultArgument() const {
2700 const Expr *E = this;
2701 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2702 E = M->GetTemporaryExpr();
2704 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
2705 E = ICE->getSubExprAsWritten();
2707 return isa<CXXDefaultArgExpr>(E);
2710 /// Skip over any no-op casts and any temporary-binding
2712 static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
2713 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
2714 E = M->GetTemporaryExpr();
2716 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2717 if (ICE->getCastKind() == CK_NoOp)
2718 E = ICE->getSubExpr();
2723 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
2724 E = BE->getSubExpr();
2726 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2727 if (ICE->getCastKind() == CK_NoOp)
2728 E = ICE->getSubExpr();
2733 return E->IgnoreParens();
2736 /// isTemporaryObject - Determines if this expression produces a
2737 /// temporary of the given class type.
2738 bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
2739 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
2742 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
2744 // Temporaries are by definition pr-values of class type.
2745 if (!E->Classify(C).isPRValue()) {
2746 // In this context, property reference is a message call and is pr-value.
2747 if (!isa<ObjCPropertyRefExpr>(E))
2751 // Black-list a few cases which yield pr-values of class type that don't
2752 // refer to temporaries of that type:
2754 // - implicit derived-to-base conversions
2755 if (isa<ImplicitCastExpr>(E)) {
2756 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
2757 case CK_DerivedToBase:
2758 case CK_UncheckedDerivedToBase:
2765 // - member expressions (all)
2766 if (isa<MemberExpr>(E))
2769 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
2770 if (BO->isPtrMemOp())
2773 // - opaque values (all)
2774 if (isa<OpaqueValueExpr>(E))
2780 bool Expr::isImplicitCXXThis() const {
2781 const Expr *E = this;
2783 // Strip away parentheses and casts we don't care about.
2785 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
2786 E = Paren->getSubExpr();
2790 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
2791 if (ICE->getCastKind() == CK_NoOp ||
2792 ICE->getCastKind() == CK_LValueToRValue ||
2793 ICE->getCastKind() == CK_DerivedToBase ||
2794 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
2795 E = ICE->getSubExpr();
2800 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
2801 if (UnOp->getOpcode() == UO_Extension) {
2802 E = UnOp->getSubExpr();
2807 if (const MaterializeTemporaryExpr *M
2808 = dyn_cast<MaterializeTemporaryExpr>(E)) {
2809 E = M->GetTemporaryExpr();
2816 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
2817 return This->isImplicit();
2822 /// hasAnyTypeDependentArguments - Determines if any of the expressions
2823 /// in Exprs is type-dependent.
2824 bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
2825 for (unsigned I = 0; I < Exprs.size(); ++I)
2826 if (Exprs[I]->isTypeDependent())
2832 bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
2833 const Expr **Culprit) const {
2834 // This function is attempting whether an expression is an initializer
2835 // which can be evaluated at compile-time. It very closely parallels
2836 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
2837 // will lead to unexpected results. Like ConstExprEmitter, it falls back
2838 // to isEvaluatable most of the time.
2840 // If we ever capture reference-binding directly in the AST, we can
2841 // kill the second parameter.
2845 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
2852 switch (getStmtClass()) {
2854 case StringLiteralClass:
2855 case ObjCEncodeExprClass:
2857 case CXXTemporaryObjectExprClass:
2858 case CXXConstructExprClass: {
2859 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
2861 if (CE->getConstructor()->isTrivial() &&
2862 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
2863 // Trivial default constructor
2864 if (!CE->getNumArgs()) return true;
2866 // Trivial copy constructor
2867 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
2868 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
2873 case CompoundLiteralExprClass: {
2874 // This handles gcc's extension that allows global initializers like
2875 // "struct x {int x;} x = (struct x) {};".
2876 // FIXME: This accepts other cases it shouldn't!
2877 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
2878 return Exp->isConstantInitializer(Ctx, false, Culprit);
2880 case DesignatedInitUpdateExprClass: {
2881 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
2882 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
2883 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
2885 case InitListExprClass: {
2886 const InitListExpr *ILE = cast<InitListExpr>(this);
2887 if (ILE->getType()->isArrayType()) {
2888 unsigned numInits = ILE->getNumInits();
2889 for (unsigned i = 0; i < numInits; i++) {
2890 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
2896 if (ILE->getType()->isRecordType()) {
2897 unsigned ElementNo = 0;
2898 RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
2899 for (const auto *Field : RD->fields()) {
2900 // If this is a union, skip all the fields that aren't being initialized.
2901 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
2904 // Don't emit anonymous bitfields, they just affect layout.
2905 if (Field->isUnnamedBitfield())
2908 if (ElementNo < ILE->getNumInits()) {
2909 const Expr *Elt = ILE->getInit(ElementNo++);
2910 if (Field->isBitField()) {
2911 // Bitfields have to evaluate to an integer.
2912 llvm::APSInt ResultTmp;
2913 if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
2919 bool RefType = Field->getType()->isReferenceType();
2920 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
2930 case ImplicitValueInitExprClass:
2931 case NoInitExprClass:
2933 case ParenExprClass:
2934 return cast<ParenExpr>(this)->getSubExpr()
2935 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2936 case GenericSelectionExprClass:
2937 return cast<GenericSelectionExpr>(this)->getResultExpr()
2938 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2939 case ChooseExprClass:
2940 if (cast<ChooseExpr>(this)->isConditionDependent()) {
2945 return cast<ChooseExpr>(this)->getChosenSubExpr()
2946 ->isConstantInitializer(Ctx, IsForRef, Culprit);
2947 case UnaryOperatorClass: {
2948 const UnaryOperator* Exp = cast<UnaryOperator>(this);
2949 if (Exp->getOpcode() == UO_Extension)
2950 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2953 case CXXFunctionalCastExprClass:
2954 case CXXStaticCastExprClass:
2955 case ImplicitCastExprClass:
2956 case CStyleCastExprClass:
2957 case ObjCBridgedCastExprClass:
2958 case CXXDynamicCastExprClass:
2959 case CXXReinterpretCastExprClass:
2960 case CXXConstCastExprClass: {
2961 const CastExpr *CE = cast<CastExpr>(this);
2963 // Handle misc casts we want to ignore.
2964 if (CE->getCastKind() == CK_NoOp ||
2965 CE->getCastKind() == CK_LValueToRValue ||
2966 CE->getCastKind() == CK_ToUnion ||
2967 CE->getCastKind() == CK_ConstructorConversion ||
2968 CE->getCastKind() == CK_NonAtomicToAtomic ||
2969 CE->getCastKind() == CK_AtomicToNonAtomic ||
2970 CE->getCastKind() == CK_IntToOCLSampler)
2971 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
2975 case MaterializeTemporaryExprClass:
2976 return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
2977 ->isConstantInitializer(Ctx, false, Culprit);
2979 case SubstNonTypeTemplateParmExprClass:
2980 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
2981 ->isConstantInitializer(Ctx, false, Culprit);
2982 case CXXDefaultArgExprClass:
2983 return cast<CXXDefaultArgExpr>(this)->getExpr()
2984 ->isConstantInitializer(Ctx, false, Culprit);
2985 case CXXDefaultInitExprClass:
2986 return cast<CXXDefaultInitExpr>(this)->getExpr()
2987 ->isConstantInitializer(Ctx, false, Culprit);
2989 // Allow certain forms of UB in constant initializers: signed integer
2990 // overflow and floating-point division by zero. We'll give a warning on
2991 // these, but they're common enough that we have to accept them.
2992 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
2999 bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
3000 const FunctionDecl* FD = getDirectCallee();
3001 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
3002 FD->getBuiltinID() != Builtin::BI__builtin_assume))
3005 const Expr* Arg = getArg(0);
3007 return !Arg->isValueDependent() &&
3008 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3012 /// Look for any side effects within a Stmt.
3013 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
3014 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
3015 const bool IncludePossibleEffects;
3016 bool HasSideEffects;
3019 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
3020 : Inherited(Context),
3021 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
3023 bool hasSideEffects() const { return HasSideEffects; }
3025 void VisitExpr(const Expr *E) {
3026 if (!HasSideEffects &&
3027 E->HasSideEffects(Context, IncludePossibleEffects))
3028 HasSideEffects = true;
3033 bool Expr::HasSideEffects(const ASTContext &Ctx,
3034 bool IncludePossibleEffects) const {
3035 // In circumstances where we care about definite side effects instead of
3036 // potential side effects, we want to ignore expressions that are part of a
3037 // macro expansion as a potential side effect.
3038 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3041 if (isInstantiationDependent())
3042 return IncludePossibleEffects;
3044 switch (getStmtClass()) {
3046 #define ABSTRACT_STMT(Type)
3047 #define STMT(Type, Base) case Type##Class:
3048 #define EXPR(Type, Base)
3049 #include "clang/AST/StmtNodes.inc"
3050 llvm_unreachable("unexpected Expr kind");
3052 case DependentScopeDeclRefExprClass:
3053 case CXXUnresolvedConstructExprClass:
3054 case CXXDependentScopeMemberExprClass:
3055 case UnresolvedLookupExprClass:
3056 case UnresolvedMemberExprClass:
3057 case PackExpansionExprClass:
3058 case SubstNonTypeTemplateParmPackExprClass:
3059 case FunctionParmPackExprClass:
3061 case CXXFoldExprClass:
3062 llvm_unreachable("shouldn't see dependent / unresolved nodes here");
3064 case DeclRefExprClass:
3065 case ObjCIvarRefExprClass:
3066 case PredefinedExprClass:
3067 case IntegerLiteralClass:
3068 case FixedPointLiteralClass:
3069 case FloatingLiteralClass:
3070 case ImaginaryLiteralClass:
3071 case StringLiteralClass:
3072 case CharacterLiteralClass:
3073 case OffsetOfExprClass:
3074 case ImplicitValueInitExprClass:
3075 case UnaryExprOrTypeTraitExprClass:
3076 case AddrLabelExprClass:
3077 case GNUNullExprClass:
3078 case ArrayInitIndexExprClass:
3079 case NoInitExprClass:
3080 case CXXBoolLiteralExprClass:
3081 case CXXNullPtrLiteralExprClass:
3082 case CXXThisExprClass:
3083 case CXXScalarValueInitExprClass:
3084 case TypeTraitExprClass:
3085 case ArrayTypeTraitExprClass:
3086 case ExpressionTraitExprClass:
3087 case CXXNoexceptExprClass:
3088 case SizeOfPackExprClass:
3089 case ObjCStringLiteralClass:
3090 case ObjCEncodeExprClass:
3091 case ObjCBoolLiteralExprClass:
3092 case ObjCAvailabilityCheckExprClass:
3093 case CXXUuidofExprClass:
3094 case OpaqueValueExprClass:
3095 // These never have a side-effect.
3099 case CXXOperatorCallExprClass:
3100 case CXXMemberCallExprClass:
3101 case CUDAKernelCallExprClass:
3102 case UserDefinedLiteralClass: {
3103 // We don't know a call definitely has side effects, except for calls
3104 // to pure/const functions that definitely don't.
3105 // If the call itself is considered side-effect free, check the operands.
3106 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3107 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3108 if (IsPure || !IncludePossibleEffects)
3113 case BlockExprClass:
3114 case CXXBindTemporaryExprClass:
3115 if (!IncludePossibleEffects)
3119 case MSPropertyRefExprClass:
3120 case MSPropertySubscriptExprClass:
3121 case CompoundAssignOperatorClass:
3122 case VAArgExprClass:
3123 case AtomicExprClass:
3124 case CXXThrowExprClass:
3125 case CXXNewExprClass:
3126 case CXXDeleteExprClass:
3127 case CoawaitExprClass:
3128 case DependentCoawaitExprClass:
3129 case CoyieldExprClass:
3130 // These always have a side-effect.
3133 case StmtExprClass: {
3134 // StmtExprs have a side-effect if any substatement does.
3135 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3136 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3137 return Finder.hasSideEffects();
3140 case ExprWithCleanupsClass:
3141 if (IncludePossibleEffects)
3142 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3146 case ParenExprClass:
3147 case ArraySubscriptExprClass:
3148 case OMPArraySectionExprClass:
3149 case MemberExprClass:
3150 case ConditionalOperatorClass:
3151 case BinaryConditionalOperatorClass:
3152 case CompoundLiteralExprClass:
3153 case ExtVectorElementExprClass:
3154 case DesignatedInitExprClass:
3155 case DesignatedInitUpdateExprClass:
3156 case ArrayInitLoopExprClass:
3157 case ParenListExprClass:
3158 case CXXPseudoDestructorExprClass:
3159 case CXXStdInitializerListExprClass:
3160 case SubstNonTypeTemplateParmExprClass:
3161 case MaterializeTemporaryExprClass:
3162 case ShuffleVectorExprClass:
3163 case ConvertVectorExprClass:
3164 case AsTypeExprClass:
3165 // These have a side-effect if any subexpression does.
3168 case UnaryOperatorClass:
3169 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3173 case BinaryOperatorClass:
3174 if (cast<BinaryOperator>(this)->isAssignmentOp())
3178 case InitListExprClass:
3179 // FIXME: The children for an InitListExpr doesn't include the array filler.
3180 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3181 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3185 case GenericSelectionExprClass:
3186 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3187 HasSideEffects(Ctx, IncludePossibleEffects);
3189 case ChooseExprClass:
3190 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3191 Ctx, IncludePossibleEffects);
3193 case CXXDefaultArgExprClass:
3194 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3195 Ctx, IncludePossibleEffects);
3197 case CXXDefaultInitExprClass: {
3198 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3199 if (const Expr *E = FD->getInClassInitializer())
3200 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3201 // If we've not yet parsed the initializer, assume it has side-effects.
3205 case CXXDynamicCastExprClass: {
3206 // A dynamic_cast expression has side-effects if it can throw.
3207 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3208 if (DCE->getTypeAsWritten()->isReferenceType() &&
3209 DCE->getCastKind() == CK_Dynamic)
3213 case ImplicitCastExprClass:
3214 case CStyleCastExprClass:
3215 case CXXStaticCastExprClass:
3216 case CXXReinterpretCastExprClass:
3217 case CXXConstCastExprClass:
3218 case CXXFunctionalCastExprClass: {
3219 // While volatile reads are side-effecting in both C and C++, we treat them
3220 // as having possible (not definite) side-effects. This allows idiomatic
3221 // code to behave without warning, such as sizeof(*v) for a volatile-
3222 // qualified pointer.
3223 if (!IncludePossibleEffects)
3226 const CastExpr *CE = cast<CastExpr>(this);
3227 if (CE->getCastKind() == CK_LValueToRValue &&
3228 CE->getSubExpr()->getType().isVolatileQualified())
3233 case CXXTypeidExprClass:
3234 // typeid might throw if its subexpression is potentially-evaluated, so has
3235 // side-effects in that case whether or not its subexpression does.
3236 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3238 case CXXConstructExprClass:
3239 case CXXTemporaryObjectExprClass: {
3240 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3241 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3243 // A trivial constructor does not add any side-effects of its own. Just look
3244 // at its arguments.
3248 case CXXInheritedCtorInitExprClass: {
3249 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3250 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3255 case LambdaExprClass: {
3256 const LambdaExpr *LE = cast<LambdaExpr>(this);
3257 for (LambdaExpr::capture_iterator I = LE->capture_begin(),
3258 E = LE->capture_end(); I != E; ++I)
3259 if (I->getCaptureKind() == LCK_ByCopy)
3260 // FIXME: Only has a side-effect if the variable is volatile or if
3261 // the copy would invoke a non-trivial copy constructor.
3266 case PseudoObjectExprClass: {
3267 // Only look for side-effects in the semantic form, and look past
3268 // OpaqueValueExpr bindings in that form.
3269 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3270 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3271 E = PO->semantics_end();
3273 const Expr *Subexpr = *I;
3274 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3275 Subexpr = OVE->getSourceExpr();
3276 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3282 case ObjCBoxedExprClass:
3283 case ObjCArrayLiteralClass:
3284 case ObjCDictionaryLiteralClass:
3285 case ObjCSelectorExprClass:
3286 case ObjCProtocolExprClass:
3287 case ObjCIsaExprClass:
3288 case ObjCIndirectCopyRestoreExprClass:
3289 case ObjCSubscriptRefExprClass:
3290 case ObjCBridgedCastExprClass:
3291 case ObjCMessageExprClass:
3292 case ObjCPropertyRefExprClass:
3293 // FIXME: Classify these cases better.
3294 if (IncludePossibleEffects)
3299 // Recurse to children.
3300 for (const Stmt *SubStmt : children())
3302 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3309 /// Look for a call to a non-trivial function within an expression.
3310 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3312 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3317 explicit NonTrivialCallFinder(const ASTContext &Context)
3318 : Inherited(Context), NonTrivial(false) { }
3320 bool hasNonTrivialCall() const { return NonTrivial; }
3322 void VisitCallExpr(const CallExpr *E) {
3323 if (const CXXMethodDecl *Method
3324 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3325 if (Method->isTrivial()) {
3326 // Recurse to children of the call.
3327 Inherited::VisitStmt(E);
3335 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3336 if (E->getConstructor()->isTrivial()) {
3337 // Recurse to children of the call.
3338 Inherited::VisitStmt(E);
3345 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3346 if (E->getTemporary()->getDestructor()->isTrivial()) {
3347 Inherited::VisitStmt(E);
3356 bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3357 NonTrivialCallFinder Finder(Ctx);
3359 return Finder.hasNonTrivialCall();
3362 /// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3363 /// pointer constant or not, as well as the specific kind of constant detected.
3364 /// Null pointer constants can be integer constant expressions with the
3365 /// value zero, casts of zero to void*, nullptr (C++0X), or __null
3366 /// (a GNU extension).
3367 Expr::NullPointerConstantKind
3368 Expr::isNullPointerConstant(ASTContext &Ctx,
3369 NullPointerConstantValueDependence NPC) const {
3370 if (isValueDependent() &&
3371 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3373 case NPC_NeverValueDependent:
3374 llvm_unreachable("Unexpected value dependent expression!");
3375 case NPC_ValueDependentIsNull:
3376 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3377 return NPCK_ZeroExpression;
3379 return NPCK_NotNull;
3381 case NPC_ValueDependentIsNotNull:
3382 return NPCK_NotNull;
3386 // Strip off a cast to void*, if it exists. Except in C++.
3387 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3388 if (!Ctx.getLangOpts().CPlusPlus) {
3389 // Check that it is a cast to void*.
3390 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3391 QualType Pointee = PT->getPointeeType();
3392 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3393 // has non-default address space it is not treated as nullptr.
3394 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3395 // since it cannot be assigned to a pointer to constant address space.
3396 bool PointeeHasDefaultAS =
3397 Pointee.getAddressSpace() == LangAS::Default ||
3398 (Ctx.getLangOpts().OpenCLVersion >= 200 &&
3399 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3400 (Ctx.getLangOpts().OpenCL &&
3401 Ctx.getLangOpts().OpenCLVersion < 200 &&
3402 Pointee.getAddressSpace() == LangAS::opencl_private);
3404 if (PointeeHasDefaultAS && Pointee->isVoidType() && // to void*
3405 CE->getSubExpr()->getType()->isIntegerType()) // from int.
3406 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3409 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3410 // Ignore the ImplicitCastExpr type entirely.
3411 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3412 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3413 // Accept ((void*)0) as a null pointer constant, as many other
3414 // implementations do.
3415 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3416 } else if (const GenericSelectionExpr *GE =
3417 dyn_cast<GenericSelectionExpr>(this)) {
3418 if (GE->isResultDependent())
3419 return NPCK_NotNull;
3420 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3421 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3422 if (CE->isConditionDependent())
3423 return NPCK_NotNull;
3424 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3425 } else if (const CXXDefaultArgExpr *DefaultArg
3426 = dyn_cast<CXXDefaultArgExpr>(this)) {
3427 // See through default argument expressions.
3428 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3429 } else if (const CXXDefaultInitExpr *DefaultInit
3430 = dyn_cast<CXXDefaultInitExpr>(this)) {
3431 // See through default initializer expressions.
3432 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3433 } else if (isa<GNUNullExpr>(this)) {
3434 // The GNU __null extension is always a null pointer constant.
3435 return NPCK_GNUNull;
3436 } else if (const MaterializeTemporaryExpr *M
3437 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3438 return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
3439 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3440 if (const Expr *Source = OVE->getSourceExpr())
3441 return Source->isNullPointerConstant(Ctx, NPC);
3444 // C++11 nullptr_t is always a null pointer constant.
3445 if (getType()->isNullPtrType())
3446 return NPCK_CXX11_nullptr;
3448 if (const RecordType *UT = getType()->getAsUnionType())
3449 if (!Ctx.getLangOpts().CPlusPlus11 &&
3450 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3451 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3452 const Expr *InitExpr = CLE->getInitializer();
3453 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3454 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3456 // This expression must be an integer type.
3457 if (!getType()->isIntegerType() ||
3458 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3459 return NPCK_NotNull;
3461 if (Ctx.getLangOpts().CPlusPlus11) {
3462 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3463 // value zero or a prvalue of type std::nullptr_t.
3464 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3465 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3466 if (Lit && !Lit->getValue())
3467 return NPCK_ZeroLiteral;
3468 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3469 return NPCK_NotNull;
3471 // If we have an integer constant expression, we need to *evaluate* it and
3472 // test for the value 0.
3473 if (!isIntegerConstantExpr(Ctx))
3474 return NPCK_NotNull;
3477 if (EvaluateKnownConstInt(Ctx) != 0)
3478 return NPCK_NotNull;
3480 if (isa<IntegerLiteral>(this))
3481 return NPCK_ZeroLiteral;
3482 return NPCK_ZeroExpression;
3485 /// If this expression is an l-value for an Objective C
3486 /// property, find the underlying property reference expression.
3487 const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3488 const Expr *E = this;
3490 assert((E->getValueKind() == VK_LValue &&
3491 E->getObjectKind() == OK_ObjCProperty) &&
3492 "expression is not a property reference");
3493 E = E->IgnoreParenCasts();
3494 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3495 if (BO->getOpcode() == BO_Comma) {
3504 return cast<ObjCPropertyRefExpr>(E);
3507 bool Expr::isObjCSelfExpr() const {
3508 const Expr *E = IgnoreParenImpCasts();
3510 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3514 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3518 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3522 return M->getSelfDecl() == Param;
3525 FieldDecl *Expr::getSourceBitField() {
3526 Expr *E = this->IgnoreParens();
3528 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3529 if (ICE->getCastKind() == CK_LValueToRValue ||
3530 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3531 E = ICE->getSubExpr()->IgnoreParens();
3536 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3537 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3538 if (Field->isBitField())
3541 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3542 FieldDecl *Ivar = IvarRef->getDecl();
3543 if (Ivar->isBitField())
3547 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3548 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3549 if (Field->isBitField())
3552 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3553 if (Expr *E = BD->getBinding())
3554 return E->getSourceBitField();
3557 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3558 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3559 return BinOp->getLHS()->getSourceBitField();
3561 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3562 return BinOp->getRHS()->getSourceBitField();
3565 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3566 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3567 return UnOp->getSubExpr()->getSourceBitField();
3572 bool Expr::refersToVectorElement() const {
3573 // FIXME: Why do we not just look at the ObjectKind here?
3574 const Expr *E = this->IgnoreParens();
3576 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3577 if (ICE->getValueKind() != VK_RValue &&
3578 ICE->getCastKind() == CK_NoOp)
3579 E = ICE->getSubExpr()->IgnoreParens();
3584 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3585 return ASE->getBase()->getType()->isVectorType();
3587 if (isa<ExtVectorElementExpr>(E))
3590 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3591 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3592 if (auto *E = BD->getBinding())
3593 return E->refersToVectorElement();
3598 bool Expr::refersToGlobalRegisterVar() const {
3599 const Expr *E = this->IgnoreParenImpCasts();
3601 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3602 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3603 if (VD->getStorageClass() == SC_Register &&
3604 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3610 /// isArrow - Return true if the base expression is a pointer to vector,
3611 /// return false if the base expression is a vector.
3612 bool ExtVectorElementExpr::isArrow() const {
3613 return getBase()->getType()->isPointerType();
3616 unsigned ExtVectorElementExpr::getNumElements() const {
3617 if (const VectorType *VT = getType()->getAs<VectorType>())
3618 return VT->getNumElements();
3622 /// containsDuplicateElements - Return true if any element access is repeated.
3623 bool ExtVectorElementExpr::containsDuplicateElements() const {
3624 // FIXME: Refactor this code to an accessor on the AST node which returns the
3625 // "type" of component access, and share with code below and in Sema.
3626 StringRef Comp = Accessor->getName();
3628 // Halving swizzles do not contain duplicate elements.
3629 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
3632 // Advance past s-char prefix on hex swizzles.
3633 if (Comp[0] == 's' || Comp[0] == 'S')
3634 Comp = Comp.substr(1);
3636 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
3637 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
3643 /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
3644 void ExtVectorElementExpr::getEncodedElementAccess(
3645 SmallVectorImpl<uint32_t> &Elts) const {
3646 StringRef Comp = Accessor->getName();
3647 bool isNumericAccessor = false;
3648 if (Comp[0] == 's' || Comp[0] == 'S') {
3649 Comp = Comp.substr(1);
3650 isNumericAccessor = true;
3653 bool isHi = Comp == "hi";
3654 bool isLo = Comp == "lo";
3655 bool isEven = Comp == "even";
3656 bool isOdd = Comp == "odd";
3658 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
3670 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
3672 Elts.push_back(Index);
3676 ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
3677 QualType Type, SourceLocation BLoc,
3679 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
3680 Type->isDependentType(), Type->isDependentType(),
3681 Type->isInstantiationDependentType(),
3682 Type->containsUnexpandedParameterPack()),
3683 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
3685 SubExprs = new (C) Stmt*[args.size()];
3686 for (unsigned i = 0; i != args.size(); i++) {
3687 if (args[i]->isTypeDependent())
3688 ExprBits.TypeDependent = true;
3689 if (args[i]->isValueDependent())
3690 ExprBits.ValueDependent = true;
3691 if (args[i]->isInstantiationDependent())
3692 ExprBits.InstantiationDependent = true;
3693 if (args[i]->containsUnexpandedParameterPack())
3694 ExprBits.ContainsUnexpandedParameterPack = true;
3696 SubExprs[i] = args[i];
3700 void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
3701 if (SubExprs) C.Deallocate(SubExprs);
3703 this->NumExprs = Exprs.size();
3704 SubExprs = new (C) Stmt*[NumExprs];
3705 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
3708 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3709 SourceLocation GenericLoc, Expr *ControllingExpr,
3710 ArrayRef<TypeSourceInfo*> AssocTypes,
3711 ArrayRef<Expr*> AssocExprs,
3712 SourceLocation DefaultLoc,
3713 SourceLocation RParenLoc,
3714 bool ContainsUnexpandedParameterPack,
3715 unsigned ResultIndex)
3716 : Expr(GenericSelectionExprClass,
3717 AssocExprs[ResultIndex]->getType(),
3718 AssocExprs[ResultIndex]->getValueKind(),
3719 AssocExprs[ResultIndex]->getObjectKind(),
3720 AssocExprs[ResultIndex]->isTypeDependent(),
3721 AssocExprs[ResultIndex]->isValueDependent(),
3722 AssocExprs[ResultIndex]->isInstantiationDependent(),
3723 ContainsUnexpandedParameterPack),
3724 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3725 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3726 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
3727 GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3728 SubExprs[CONTROLLING] = ControllingExpr;
3729 assert(AssocTypes.size() == AssocExprs.size());
3730 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3731 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3734 GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
3735 SourceLocation GenericLoc, Expr *ControllingExpr,
3736 ArrayRef<TypeSourceInfo*> AssocTypes,
3737 ArrayRef<Expr*> AssocExprs,
3738 SourceLocation DefaultLoc,
3739 SourceLocation RParenLoc,
3740 bool ContainsUnexpandedParameterPack)
3741 : Expr(GenericSelectionExprClass,
3742 Context.DependentTy,
3745 /*isTypeDependent=*/true,
3746 /*isValueDependent=*/true,
3747 /*isInstantiationDependent=*/true,
3748 ContainsUnexpandedParameterPack),
3749 AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
3750 SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
3751 NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
3752 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
3753 SubExprs[CONTROLLING] = ControllingExpr;
3754 assert(AssocTypes.size() == AssocExprs.size());
3755 std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
3756 std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
3759 //===----------------------------------------------------------------------===//
3760 // DesignatedInitExpr
3761 //===----------------------------------------------------------------------===//
3763 IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
3764 assert(Kind == FieldDesignator && "Only valid on a field designator");
3765 if (Field.NameOrField & 0x01)
3766 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
3768 return getField()->getIdentifier();
3771 DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
3772 llvm::ArrayRef<Designator> Designators,
3773 SourceLocation EqualOrColonLoc,
3775 ArrayRef<Expr*> IndexExprs,
3777 : Expr(DesignatedInitExprClass, Ty,
3778 Init->getValueKind(), Init->getObjectKind(),
3779 Init->isTypeDependent(), Init->isValueDependent(),
3780 Init->isInstantiationDependent(),
3781 Init->containsUnexpandedParameterPack()),
3782 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
3783 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
3784 this->Designators = new (C) Designator[NumDesignators];
3786 // Record the initializer itself.
3787 child_iterator Child = child_begin();
3790 // Copy the designators and their subexpressions, computing
3791 // value-dependence along the way.
3792 unsigned IndexIdx = 0;
3793 for (unsigned I = 0; I != NumDesignators; ++I) {
3794 this->Designators[I] = Designators[I];
3796 if (this->Designators[I].isArrayDesignator()) {
3797 // Compute type- and value-dependence.
3798 Expr *Index = IndexExprs[IndexIdx];
3799 if (Index->isTypeDependent() || Index->isValueDependent())
3800 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3801 if (Index->isInstantiationDependent())
3802 ExprBits.InstantiationDependent = true;
3803 // Propagate unexpanded parameter packs.
3804 if (Index->containsUnexpandedParameterPack())
3805 ExprBits.ContainsUnexpandedParameterPack = true;
3807 // Copy the index expressions into permanent storage.
3808 *Child++ = IndexExprs[IndexIdx++];
3809 } else if (this->Designators[I].isArrayRangeDesignator()) {
3810 // Compute type- and value-dependence.
3811 Expr *Start = IndexExprs[IndexIdx];
3812 Expr *End = IndexExprs[IndexIdx + 1];
3813 if (Start->isTypeDependent() || Start->isValueDependent() ||
3814 End->isTypeDependent() || End->isValueDependent()) {
3815 ExprBits.TypeDependent = ExprBits.ValueDependent = true;
3816 ExprBits.InstantiationDependent = true;
3817 } else if (Start->isInstantiationDependent() ||
3818 End->isInstantiationDependent()) {
3819 ExprBits.InstantiationDependent = true;
3822 // Propagate unexpanded parameter packs.
3823 if (Start->containsUnexpandedParameterPack() ||
3824 End->containsUnexpandedParameterPack())
3825 ExprBits.ContainsUnexpandedParameterPack = true;
3827 // Copy the start/end expressions into permanent storage.
3828 *Child++ = IndexExprs[IndexIdx++];
3829 *Child++ = IndexExprs[IndexIdx++];
3833 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
3836 DesignatedInitExpr *
3837 DesignatedInitExpr::Create(const ASTContext &C,
3838 llvm::ArrayRef<Designator> Designators,
3839 ArrayRef<Expr*> IndexExprs,
3840 SourceLocation ColonOrEqualLoc,
3841 bool UsesColonSyntax, Expr *Init) {
3842 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
3843 alignof(DesignatedInitExpr));
3844 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
3845 ColonOrEqualLoc, UsesColonSyntax,
3849 DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
3850 unsigned NumIndexExprs) {
3851 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
3852 alignof(DesignatedInitExpr));
3853 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
3856 void DesignatedInitExpr::setDesignators(const ASTContext &C,
3857 const Designator *Desigs,
3858 unsigned NumDesigs) {
3859 Designators = new (C) Designator[NumDesigs];
3860 NumDesignators = NumDesigs;
3861 for (unsigned I = 0; I != NumDesigs; ++I)
3862 Designators[I] = Desigs[I];
3865 SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
3866 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
3868 return DIE->getDesignator(0)->getSourceRange();
3869 return SourceRange(DIE->getDesignator(0)->getLocStart(),
3870 DIE->getDesignator(size()-1)->getLocEnd());
3873 SourceLocation DesignatedInitExpr::getBeginLoc() const {
3874 SourceLocation StartLoc;
3875 auto *DIE = const_cast<DesignatedInitExpr *>(this);
3876 Designator &First = *DIE->getDesignator(0);
3877 if (First.isFieldDesignator()) {
3879 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
3881 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
3884 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
3888 SourceLocation DesignatedInitExpr::getEndLoc() const {
3889 return getInit()->getLocEnd();
3892 Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
3893 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
3894 return getSubExpr(D.ArrayOrRange.Index + 1);
3897 Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
3898 assert(D.Kind == Designator::ArrayRangeDesignator &&
3899 "Requires array range designator");
3900 return getSubExpr(D.ArrayOrRange.Index + 1);
3903 Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
3904 assert(D.Kind == Designator::ArrayRangeDesignator &&
3905 "Requires array range designator");
3906 return getSubExpr(D.ArrayOrRange.Index + 2);
3909 /// Replaces the designator at index @p Idx with the series
3910 /// of designators in [First, Last).
3911 void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
3912 const Designator *First,
3913 const Designator *Last) {
3914 unsigned NumNewDesignators = Last - First;
3915 if (NumNewDesignators == 0) {
3916 std::copy_backward(Designators + Idx + 1,
3917 Designators + NumDesignators,
3919 --NumNewDesignators;
3921 } else if (NumNewDesignators == 1) {
3922 Designators[Idx] = *First;
3926 Designator *NewDesignators
3927 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
3928 std::copy(Designators, Designators + Idx, NewDesignators);
3929 std::copy(First, Last, NewDesignators + Idx);
3930 std::copy(Designators + Idx + 1, Designators + NumDesignators,
3931 NewDesignators + Idx + NumNewDesignators);
3932 Designators = NewDesignators;
3933 NumDesignators = NumDesignators - 1 + NumNewDesignators;
3936 DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
3937 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
3938 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
3939 OK_Ordinary, false, false, false, false) {
3940 BaseAndUpdaterExprs[0] = baseExpr;
3942 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
3943 ILE->setType(baseExpr->getType());
3944 BaseAndUpdaterExprs[1] = ILE;
3947 SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
3948 return getBase()->getLocStart();
3951 SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
3952 return getBase()->getLocEnd();
3955 ParenListExpr::ParenListExpr(const ASTContext& C, SourceLocation lparenloc,
3956 ArrayRef<Expr*> exprs,
3957 SourceLocation rparenloc)
3958 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary,
3959 false, false, false, false),
3960 NumExprs(exprs.size()), LParenLoc(lparenloc), RParenLoc(rparenloc) {
3961 Exprs = new (C) Stmt*[exprs.size()];
3962 for (unsigned i = 0; i != exprs.size(); ++i) {
3963 if (exprs[i]->isTypeDependent())
3964 ExprBits.TypeDependent = true;
3965 if (exprs[i]->isValueDependent())
3966 ExprBits.ValueDependent = true;
3967 if (exprs[i]->isInstantiationDependent())
3968 ExprBits.InstantiationDependent = true;
3969 if (exprs[i]->containsUnexpandedParameterPack())
3970 ExprBits.ContainsUnexpandedParameterPack = true;
3972 Exprs[i] = exprs[i];
3976 const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
3977 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
3978 e = ewc->getSubExpr();
3979 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
3980 e = m->GetTemporaryExpr();
3981 e = cast<CXXConstructExpr>(e)->getArg(0);
3982 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
3983 e = ice->getSubExpr();
3984 return cast<OpaqueValueExpr>(e);
3987 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
3989 unsigned numSemanticExprs) {
3991 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
3992 alignof(PseudoObjectExpr));
3993 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
3996 PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
3997 : Expr(PseudoObjectExprClass, shell) {
3998 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4001 PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4002 ArrayRef<Expr*> semantics,
4003 unsigned resultIndex) {
4004 assert(syntax && "no syntactic expression!");
4005 assert(semantics.size() && "no semantic expressions!");
4009 if (resultIndex == NoResult) {
4013 assert(resultIndex < semantics.size());
4014 type = semantics[resultIndex]->getType();
4015 VK = semantics[resultIndex]->getValueKind();
4016 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
4019 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
4020 alignof(PseudoObjectExpr));
4021 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4025 PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4026 Expr *syntax, ArrayRef<Expr*> semantics,
4027 unsigned resultIndex)
4028 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4029 /*filled in at end of ctor*/ false, false, false, false) {
4030 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4031 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4033 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4034 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4035 getSubExprsBuffer()[i] = E;
4037 if (E->isTypeDependent())
4038 ExprBits.TypeDependent = true;
4039 if (E->isValueDependent())
4040 ExprBits.ValueDependent = true;
4041 if (E->isInstantiationDependent())
4042 ExprBits.InstantiationDependent = true;
4043 if (E->containsUnexpandedParameterPack())
4044 ExprBits.ContainsUnexpandedParameterPack = true;
4046 if (isa<OpaqueValueExpr>(E))
4047 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
4048 "opaque-value semantic expressions for pseudo-object "
4049 "operations must have sources");
4053 //===----------------------------------------------------------------------===//
4054 // Child Iterators for iterating over subexpressions/substatements
4055 //===----------------------------------------------------------------------===//
4057 // UnaryExprOrTypeTraitExpr
4058 Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4059 const_child_range CCR =
4060 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4061 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4064 Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
4065 // If this is of a type and the type is a VLA type (and not a typedef), the
4066 // size expression of the VLA needs to be treated as an executable expression.
4067 // Why isn't this weirdness documented better in StmtIterator?
4068 if (isArgumentType()) {
4069 if (const VariableArrayType *T =
4070 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4071 return const_child_range(const_child_iterator(T), const_child_iterator());
4072 return const_child_range(const_child_iterator(), const_child_iterator());
4074 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4077 AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4078 QualType t, AtomicOp op, SourceLocation RP)
4079 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4080 false, false, false, false),
4081 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4083 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
4084 for (unsigned i = 0; i != args.size(); i++) {
4085 if (args[i]->isTypeDependent())
4086 ExprBits.TypeDependent = true;
4087 if (args[i]->isValueDependent())
4088 ExprBits.ValueDependent = true;
4089 if (args[i]->isInstantiationDependent())
4090 ExprBits.InstantiationDependent = true;
4091 if (args[i]->containsUnexpandedParameterPack())
4092 ExprBits.ContainsUnexpandedParameterPack = true;
4094 SubExprs[i] = args[i];
4098 unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4100 case AO__c11_atomic_init:
4101 case AO__opencl_atomic_init:
4102 case AO__c11_atomic_load:
4103 case AO__atomic_load_n:
4106 case AO__opencl_atomic_load:
4107 case AO__c11_atomic_store:
4108 case AO__c11_atomic_exchange:
4109 case AO__atomic_load:
4110 case AO__atomic_store:
4111 case AO__atomic_store_n:
4112 case AO__atomic_exchange_n:
4113 case AO__c11_atomic_fetch_add:
4114 case AO__c11_atomic_fetch_sub:
4115 case AO__c11_atomic_fetch_and:
4116 case AO__c11_atomic_fetch_or:
4117 case AO__c11_atomic_fetch_xor:
4118 case AO__atomic_fetch_add:
4119 case AO__atomic_fetch_sub:
4120 case AO__atomic_fetch_and:
4121 case AO__atomic_fetch_or:
4122 case AO__atomic_fetch_xor:
4123 case AO__atomic_fetch_nand:
4124 case AO__atomic_add_fetch:
4125 case AO__atomic_sub_fetch:
4126 case AO__atomic_and_fetch:
4127 case AO__atomic_or_fetch:
4128 case AO__atomic_xor_fetch:
4129 case AO__atomic_nand_fetch:
4130 case AO__atomic_fetch_min:
4131 case AO__atomic_fetch_max:
4134 case AO__opencl_atomic_store:
4135 case AO__opencl_atomic_exchange:
4136 case AO__opencl_atomic_fetch_add:
4137 case AO__opencl_atomic_fetch_sub:
4138 case AO__opencl_atomic_fetch_and:
4139 case AO__opencl_atomic_fetch_or:
4140 case AO__opencl_atomic_fetch_xor:
4141 case AO__opencl_atomic_fetch_min:
4142 case AO__opencl_atomic_fetch_max:
4143 case AO__atomic_exchange:
4146 case AO__c11_atomic_compare_exchange_strong:
4147 case AO__c11_atomic_compare_exchange_weak:
4150 case AO__opencl_atomic_compare_exchange_strong:
4151 case AO__opencl_atomic_compare_exchange_weak:
4152 case AO__atomic_compare_exchange:
4153 case AO__atomic_compare_exchange_n:
4156 llvm_unreachable("unknown atomic op");
4159 QualType AtomicExpr::getValueType() const {
4160 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4161 if (auto AT = T->getAs<AtomicType>())
4162 return AT->getValueType();
4166 QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
4167 unsigned ArraySectionCount = 0;
4168 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4169 Base = OASE->getBase();
4170 ++ArraySectionCount;
4173 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
4174 Base = ASE->getBase();
4175 ++ArraySectionCount;
4177 Base = Base->IgnoreParenImpCasts();
4178 auto OriginalTy = Base->getType();
4179 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4180 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4181 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4183 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4184 if (OriginalTy->isAnyPointerType())
4185 OriginalTy = OriginalTy->getPointeeType();
4187 assert (OriginalTy->isArrayType());
4188 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();