r288866 - [c++17] P0135R1: Guaranteed copy elision.
Duncan P. N. Exon Smith via cfe-commits
cfe-commits at lists.llvm.org
Thu Dec 8 19:30:01 PST 2016
Hmm, never mind. The test seems to preclude copy elision if I'm looking in the right place:
std::streambuf &get();
int main()
{
std::streambuf sb = get(); // expected-error
}
> On 2016-Dec-08, at 19:17, Duncan P. N. Exon Smith via cfe-commits <cfe-commits at lists.llvm.org> wrote:
>
> +Eric, Marshall
>
> I haven't looked, but: from the test name, "copy.fail.cpp", I suspect there is a bug/incompatibility in the test. It likely relies on the compiler trying (and failing) to copy something in a context where r288866 guarantees that there is no copy.
>
>> On 2016-Dec-08, at 18:00, Adrian Prantl <aprantl at apple.com> wrote:
>>
>> Hi Richard,
>>
>> at this point this is more a heads-up than anything actionable, but I wanted to let you know that I bisected this bot failure (http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan_check/2721/consoleFull#10584592348254eaf0-7326-4999-85b0-388101f2d404) of std/input.output/stream.buffers/streambuf/streambuf.cons/copy.fail.cpp down to this commit.
>>
>> I will follow up once I have a better understanding what is going on there.
>>
>> -- adrian
>>
>>> On Dec 6, 2016, at 3:52 PM, Richard Smith via cfe-commits <cfe-commits at lists.llvm.org> wrote:
>>>
>>> Author: rsmith
>>> Date: Tue Dec 6 17:52:28 2016
>>> New Revision: 288866
>>>
>>> URL: http://llvm.org/viewvc/llvm-project?rev=288866&view=rev
>>> Log:
>>> [c++17] P0135R1: Guaranteed copy elision.
>>>
>>> When an object of class type is initialized from a prvalue of the same type
>>> (ignoring cv qualifications), use the prvalue to initialize the object directly
>>> instead of inserting a redundant elidable call to a copy constructor.
>>>
>>> Added:
>>> cfe/trunk/test/CodeGenCXX/cxx1z-copy-omission.cpp
>>> cfe/trunk/test/SemaCXX/cxx1z-copy-omission.cpp
>>> Modified:
>>> cfe/trunk/include/clang/AST/Expr.h
>>> cfe/trunk/lib/AST/Expr.cpp
>>> cfe/trunk/lib/AST/ExprConstant.cpp
>>> cfe/trunk/lib/CodeGen/CGExpr.cpp
>>> cfe/trunk/lib/CodeGen/CGExprAgg.cpp
>>> cfe/trunk/lib/CodeGen/CGExprConstant.cpp
>>> cfe/trunk/lib/Sema/SemaExprCXX.cpp
>>> cfe/trunk/lib/Sema/SemaInit.cpp
>>> cfe/trunk/lib/Sema/SemaOverload.cpp
>>> cfe/trunk/test/CXX/drs/dr0xx.cpp
>>> cfe/trunk/test/CXX/drs/dr10xx.cpp
>>> cfe/trunk/test/CXX/drs/dr1xx.cpp
>>> cfe/trunk/test/CXX/drs/dr4xx.cpp
>>> cfe/trunk/test/SemaCXX/aggregate-initialization.cpp
>>> cfe/trunk/www/cxx_dr_status.html
>>> cfe/trunk/www/cxx_status.html
>>>
>>> Modified: cfe/trunk/include/clang/AST/Expr.h
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Expr.h?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/include/clang/AST/Expr.h (original)
>>> +++ cfe/trunk/include/clang/AST/Expr.h Tue Dec 6 17:52:28 2016
>>> @@ -3786,7 +3786,7 @@ public:
>>>
>>> /// \brief Build an empty initializer list.
>>> explicit InitListExpr(EmptyShell Empty)
>>> - : Expr(InitListExprClass, Empty) { }
>>> + : Expr(InitListExprClass, Empty), AltForm(nullptr, true) { }
>>>
>>> unsigned getNumInits() const { return InitExprs.size(); }
>>>
>>> @@ -3894,6 +3894,11 @@ public:
>>> // literal or an @encode?
>>> bool isStringLiteralInit() const;
>>>
>>> + /// Is this a transparent initializer list (that is, an InitListExpr that is
>>> + /// purely syntactic, and whose semantics are that of the sole contained
>>> + /// initializer)?
>>> + bool isTransparent() const;
>>> +
>>> SourceLocation getLBraceLoc() const { return LBraceLoc; }
>>> void setLBraceLoc(SourceLocation Loc) { LBraceLoc = Loc; }
>>> SourceLocation getRBraceLoc() const { return RBraceLoc; }
>>>
>>> Modified: cfe/trunk/lib/AST/Expr.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/Expr.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/AST/Expr.cpp (original)
>>> +++ cfe/trunk/lib/AST/Expr.cpp Tue Dec 6 17:52:28 2016
>>> @@ -1864,6 +1864,24 @@ bool InitListExpr::isStringLiteralInit()
>>> return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
>>> }
>>>
>>> +bool InitListExpr::isTransparent() const {
>>> + assert(isSemanticForm() && "syntactic form never semantically transparent");
>>> +
>>> + // A glvalue InitListExpr is always just sugar.
>>> + if (isGLValue()) {
>>> + assert(getNumInits() == 1 && "multiple inits in glvalue init list");
>>> + return true;
>>> + }
>>> +
>>> + // Otherwise, we're sugar if and only if we have exactly one initializer that
>>> + // is of the same type.
>>> + if (getNumInits() != 1 || !getInit(0))
>>> + return false;
>>> +
>>> + return getType().getCanonicalType() ==
>>> + getInit(0)->getType().getCanonicalType();
>>> +}
>>> +
>>> SourceLocation InitListExpr::getLocStart() const {
>>> if (InitListExpr *SyntacticForm = getSyntacticForm())
>>> return SyntacticForm->getLocStart();
>>> @@ -2246,12 +2264,15 @@ bool Expr::isUnusedResultAWarning(const
>>> // effects (e.g. a placement new with an uninitialized POD).
>>> case CXXDeleteExprClass:
>>> return false;
>>> + case MaterializeTemporaryExprClass:
>>> + return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
>>> + ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
>>> case CXXBindTemporaryExprClass:
>>> - return (cast<CXXBindTemporaryExpr>(this)
>>> - ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
>>> + return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
>>> + ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
>>> case ExprWithCleanupsClass:
>>> - return (cast<ExprWithCleanups>(this)
>>> - ->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
>>> + return cast<ExprWithCleanups>(this)->getSubExpr()
>>> + ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
>>> }
>>> }
>>>
>>>
>>> Modified: cfe/trunk/lib/AST/ExprConstant.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ExprConstant.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/AST/ExprConstant.cpp (original)
>>> +++ cfe/trunk/lib/AST/ExprConstant.cpp Tue Dec 6 17:52:28 2016
>>> @@ -5670,6 +5670,9 @@ bool RecordExprEvaluator::VisitCastExpr(
>>> }
>>>
>>> bool RecordExprEvaluator::VisitInitListExpr(const InitListExpr *E) {
>>> + if (E->isTransparent())
>>> + return Visit(E->getInit(0));
>>> +
>>> const RecordDecl *RD = E->getType()->castAs<RecordType>()->getDecl();
>>> if (RD->isInvalidDecl()) return false;
>>> const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(RD);
>>>
>>> Modified: cfe/trunk/lib/CodeGen/CGExpr.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExpr.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/CodeGen/CGExpr.cpp (original)
>>> +++ cfe/trunk/lib/CodeGen/CGExpr.cpp Tue Dec 6 17:52:28 2016
>>> @@ -3522,7 +3522,7 @@ LValue CodeGenFunction::EmitInitListLVal
>>> return EmitAggExprToLValue(E);
>>>
>>> // An lvalue initializer list must be initializing a reference.
>>> - assert(E->getNumInits() == 1 && "reference init with multiple values");
>>> + assert(E->isTransparent() && "non-transparent glvalue init list");
>>> return EmitLValue(E->getInit(0));
>>> }
>>>
>>>
>>> Modified: cfe/trunk/lib/CodeGen/CGExprAgg.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprAgg.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/CodeGen/CGExprAgg.cpp (original)
>>> +++ cfe/trunk/lib/CodeGen/CGExprAgg.cpp Tue Dec 6 17:52:28 2016
>>> @@ -1145,15 +1145,15 @@ void AggExprEmitter::VisitInitListExpr(I
>>> if (E->hadArrayRangeDesignator())
>>> CGF.ErrorUnsupported(E, "GNU array range designator extension");
>>>
>>> + if (E->isTransparent())
>>> + return Visit(E->getInit(0));
>>> +
>>> AggValueSlot Dest = EnsureSlot(E->getType());
>>>
>>> LValue DestLV = CGF.MakeAddrLValue(Dest.getAddress(), E->getType());
>>>
>>> // Handle initialization of an array.
>>> if (E->getType()->isArrayType()) {
>>> - if (E->isStringLiteralInit())
>>> - return Visit(E->getInit(0));
>>> -
>>> QualType elementType =
>>> CGF.getContext().getAsArrayType(E->getType())->getElementType();
>>>
>>> @@ -1162,16 +1162,6 @@ void AggExprEmitter::VisitInitListExpr(I
>>> return;
>>> }
>>>
>>> - if (E->getType()->isAtomicType()) {
>>> - // An _Atomic(T) object can be list-initialized from an expression
>>> - // of the same type.
>>> - assert(E->getNumInits() == 1 &&
>>> - CGF.getContext().hasSameUnqualifiedType(E->getInit(0)->getType(),
>>> - E->getType()) &&
>>> - "unexpected list initialization for atomic object");
>>> - return Visit(E->getInit(0));
>>> - }
>>> -
>>> assert(E->getType()->isRecordType() && "Only support structs/unions here!");
>>>
>>> // Do struct initialization; this code just sets each individual member
>>>
>>> Modified: cfe/trunk/lib/CodeGen/CGExprConstant.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGExprConstant.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/CodeGen/CGExprConstant.cpp (original)
>>> +++ cfe/trunk/lib/CodeGen/CGExprConstant.cpp Tue Dec 6 17:52:28 2016
>>> @@ -778,9 +778,6 @@ public:
>>> }
>>>
>>> llvm::Constant *EmitArrayInitialization(InitListExpr *ILE) {
>>> - if (ILE->isStringLiteralInit())
>>> - return Visit(ILE->getInit(0));
>>> -
>>> llvm::ArrayType *AType =
>>> cast<llvm::ArrayType>(ConvertType(ILE->getType()));
>>> llvm::Type *ElemTy = AType->getElementType();
>>> @@ -845,6 +842,9 @@ public:
>>> }
>>>
>>> llvm::Constant *VisitInitListExpr(InitListExpr *ILE) {
>>> + if (ILE->isTransparent())
>>> + return Visit(ILE->getInit(0));
>>> +
>>> if (ILE->getType()->isArrayType())
>>> return EmitArrayInitialization(ILE);
>>>
>>>
>>> Modified: cfe/trunk/lib/Sema/SemaExprCXX.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExprCXX.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/Sema/SemaExprCXX.cpp (original)
>>> +++ cfe/trunk/lib/Sema/SemaExprCXX.cpp Tue Dec 6 17:52:28 2016
>>> @@ -6836,6 +6836,16 @@ ExprResult Sema::IgnoredValueConversions
>>> return E;
>>> E = Res.get();
>>> }
>>> +
>>> + // C++1z:
>>> + // If the expression is a prvalue after this optional conversion, the
>>> + // temporary materialization conversion is applied.
>>> + //
>>> + // We skip this step: IR generation is able to synthesize the storage for
>>> + // itself in the aggregate case, and adding the extra node to the AST is
>>> + // just clutter.
>>> + // FIXME: We don't emit lifetime markers for the temporaries due to this.
>>> + // FIXME: Do any other AST consumers care about this?
>>> return E;
>>> }
>>>
>>>
>>> Modified: cfe/trunk/lib/Sema/SemaInit.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaInit.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/Sema/SemaInit.cpp (original)
>>> +++ cfe/trunk/lib/Sema/SemaInit.cpp Tue Dec 6 17:52:28 2016
>>> @@ -3546,8 +3546,14 @@ static void TryConstructorInitialization
>>> InitializationSequence &Sequence,
>>> bool IsListInit = false,
>>> bool IsInitListCopy = false) {
>>> - assert((!IsListInit || (Args.size() == 1 && isa<InitListExpr>(Args[0]))) &&
>>> - "IsListInit must come with a single initializer list argument.");
>>> + assert(((!IsListInit && !IsInitListCopy) ||
>>> + (Args.size() == 1 && isa<InitListExpr>(Args[0]))) &&
>>> + "IsListInit/IsInitListCopy must come with a single initializer list "
>>> + "argument.");
>>> + InitListExpr *ILE =
>>> + (IsListInit || IsInitListCopy) ? cast<InitListExpr>(Args[0]) : nullptr;
>>> + MultiExprArg UnwrappedArgs =
>>> + ILE ? MultiExprArg(ILE->getInits(), ILE->getNumInits()) : Args;
>>>
>>> // The type we're constructing needs to be complete.
>>> if (!S.isCompleteType(Kind.getLocation(), DestType)) {
>>> @@ -3555,6 +3561,35 @@ static void TryConstructorInitialization
>>> return;
>>> }
>>>
>>> + // C++1z [dcl.init]p17:
>>> + // - If the initializer expression is a prvalue and the cv-unqualified
>>> + // version of the source type is the same class as the class of the
>>> + // destination, the initializer expression is used to initialize the
>>> + // destination object.
>>> + // Per DR (no number yet), this does not apply when initializing a base
>>> + // class or delegating to another constructor from a mem-initializer.
>>> + if (S.getLangOpts().CPlusPlus1z &&
>>> + Entity.getKind() != InitializedEntity::EK_Base &&
>>> + Entity.getKind() != InitializedEntity::EK_Delegating &&
>>> + UnwrappedArgs.size() == 1 && UnwrappedArgs[0]->isRValue() &&
>>> + S.Context.hasSameUnqualifiedType(UnwrappedArgs[0]->getType(), DestType)) {
>>> + // Convert qualifications if necessary.
>>> + QualType InitType = UnwrappedArgs[0]->getType();
>>> + ImplicitConversionSequence ICS;
>>> + ICS.setStandard();
>>> + ICS.Standard.setAsIdentityConversion();
>>> + ICS.Standard.setFromType(InitType);
>>> + ICS.Standard.setAllToTypes(InitType);
>>> + if (!S.Context.hasSameType(InitType, DestType)) {
>>> + ICS.Standard.Third = ICK_Qualification;
>>> + ICS.Standard.setToType(2, DestType);
>>> + }
>>> + Sequence.AddConversionSequenceStep(ICS, DestType);
>>> + if (ILE)
>>> + Sequence.RewrapReferenceInitList(DestType, ILE);
>>> + return;
>>> + }
>>> +
>>> const RecordType *DestRecordType = DestType->getAs<RecordType>();
>>> assert(DestRecordType && "Constructor initialization requires record type");
>>> CXXRecordDecl *DestRecordDecl
>>> @@ -3588,20 +3623,16 @@ static void TryConstructorInitialization
>>> // constructors of the class T and the argument list consists of the
>>> // initializer list as a single argument.
>>> if (IsListInit) {
>>> - InitListExpr *ILE = cast<InitListExpr>(Args[0]);
>>> AsInitializerList = true;
>>>
>>> // If the initializer list has no elements and T has a default constructor,
>>> // the first phase is omitted.
>>> - if (ILE->getNumInits() != 0 || !DestRecordDecl->hasDefaultConstructor())
>>> + if (!(UnwrappedArgs.empty() && DestRecordDecl->hasDefaultConstructor()))
>>> Result = ResolveConstructorOverload(S, Kind.getLocation(), Args,
>>> CandidateSet, Ctors, Best,
>>> CopyInitialization, AllowExplicit,
>>> /*OnlyListConstructor=*/true,
>>> IsListInit);
>>> -
>>> - // Time to unwrap the init list.
>>> - Args = MultiExprArg(ILE->getInits(), ILE->getNumInits());
>>> }
>>>
>>> // C++11 [over.match.list]p1:
>>> @@ -3611,7 +3642,7 @@ static void TryConstructorInitialization
>>> // elements of the initializer list.
>>> if (Result == OR_No_Viable_Function) {
>>> AsInitializerList = false;
>>> - Result = ResolveConstructorOverload(S, Kind.getLocation(), Args,
>>> + Result = ResolveConstructorOverload(S, Kind.getLocation(), UnwrappedArgs,
>>> CandidateSet, Ctors, Best,
>>> CopyInitialization, AllowExplicit,
>>> /*OnlyListConstructors=*/false,
>>> @@ -3821,8 +3852,8 @@ static void TryListInitialization(Sema &
>>> QualType InitType = InitList->getInit(0)->getType();
>>> if (S.Context.hasSameUnqualifiedType(InitType, DestType) ||
>>> S.IsDerivedFrom(InitList->getLocStart(), InitType, DestType)) {
>>> - Expr *InitAsExpr = InitList->getInit(0);
>>> - TryConstructorInitialization(S, Entity, Kind, InitAsExpr, DestType,
>>> + Expr *InitListAsExpr = InitList;
>>> + TryConstructorInitialization(S, Entity, Kind, InitListAsExpr, DestType,
>>> Sequence, /*InitListSyntax*/ false,
>>> /*IsInitListCopy*/ true);
>>> return;
>>> @@ -4332,16 +4363,21 @@ static void TryReferenceInitializationCo
>>> }
>>>
>>> // - If the initializer expression
>>> + // C++14-and-before:
>>> // - is an xvalue, class prvalue, array prvalue, or function lvalue and
>>> // "cv1 T1" is reference-compatible with "cv2 T2"
>>> + // C++1z:
>>> + // - is an rvalue or function lvalue and "cv1 T1" is reference-compatible
>>> + // with "cv2 T2"
>>> // Note: functions are handled below.
>>> if (!T1Function &&
>>> (RefRelationship == Sema::Ref_Compatible ||
>>> (Kind.isCStyleOrFunctionalCast() &&
>>> RefRelationship == Sema::Ref_Related)) &&
>>> (InitCategory.isXValue() ||
>>> - (InitCategory.isPRValue() && T2->isRecordType()) ||
>>> - (InitCategory.isPRValue() && T2->isArrayType()))) {
>>> + (InitCategory.isPRValue() &&
>>> + (S.getLangOpts().CPlusPlus1z || T2->isRecordType() ||
>>> + T2->isArrayType())))) {
>>> ExprValueKind ValueKind = InitCategory.isXValue()? VK_XValue : VK_RValue;
>>> if (InitCategory.isPRValue() && T2->isRecordType()) {
>>> // The corresponding bullet in C++03 [dcl.init.ref]p5 gives the
>>> @@ -6604,7 +6640,26 @@ InitializationSequence::Perform(Sema &S,
>>> CreatedObject = Conversion->getReturnType()->isRecordType();
>>> }
>>>
>>> + // C++14 and before:
>>> + // - if the function is a constructor, the call initializes a temporary
>>> + // of the cv-unqualified version of the destination type [...]
>>> + // C++1z:
>>> + // - if the function is a constructor, the call is a prvalue of the
>>> + // cv-unqualified version of the destination type whose return object
>>> + // is initialized by the constructor [...]
>>> + // Both:
>>> + // The [..] call is used to direct-initialize, according to the rules
>>> + // above, the object that is the destination of the
>>> + // copy-initialization.
>>> + // In C++14 and before, that always means the "constructors are
>>> + // considered" bullet, because we have arrived at a reference-related
>>> + // type. In C++1z, it only means that if the types are different or we
>>> + // didn't produce a prvalue, so just check for that case here.
>>> bool RequiresCopy = !IsCopy && !isReferenceBinding(Steps.back());
>>> + if (S.getLangOpts().CPlusPlus1z && CurInit.get()->isRValue() &&
>>> + S.Context.hasSameUnqualifiedType(
>>> + Entity.getType().getNonReferenceType(), CurInit.get()->getType()))
>>> + RequiresCopy = false;
>>> bool MaybeBindToTemp = RequiresCopy || shouldBindAsTemporary(Entity);
>>>
>>> if (!MaybeBindToTemp && CreatedObject && shouldDestroyTemporary(Entity)) {
>>>
>>> Modified: cfe/trunk/lib/Sema/SemaOverload.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaOverload.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/lib/Sema/SemaOverload.cpp (original)
>>> +++ cfe/trunk/lib/Sema/SemaOverload.cpp Tue Dec 6 17:52:28 2016
>>> @@ -4979,7 +4979,7 @@ TryObjectArgumentInitialization(Sema &S,
>>> // cv-qualification on the member function declaration.
>>> //
>>> // However, when finding an implicit conversion sequence for the argument, we
>>> - // are not allowed to create temporaries or perform user-defined conversions
>>> + // are not allowed to perform user-defined conversions
>>> // (C++ [over.match.funcs]p5). We perform a simplified version of
>>> // reference binding here, that allows class rvalues to bind to
>>> // non-constant references.
>>>
>>> Modified: cfe/trunk/test/CXX/drs/dr0xx.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/drs/dr0xx.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/CXX/drs/dr0xx.cpp (original)
>>> +++ cfe/trunk/test/CXX/drs/dr0xx.cpp Tue Dec 6 17:52:28 2016
>>> @@ -248,7 +248,7 @@ namespace dr20 { // dr20: yes
>>> private:
>>> X(const X&); // expected-note {{here}}
>>> };
>>> - X f();
>>> + X &f();
>>> X x = f(); // expected-error {{private}}
>>> }
>>>
>>> @@ -316,8 +316,15 @@ namespace dr25 { // dr25: yes
>>> namespace dr26 { // dr26: yes
>>> struct A { A(A, const A & = A()); }; // expected-error {{must pass its first argument by reference}}
>>> struct B {
>>> - B(); // expected-note {{candidate}}
>>> - B(const B &, B = B()); // expected-error {{no matching constructor}} expected-note {{candidate}} expected-note {{here}}
>>> + B(); // expected-note 0-1{{candidate}}
>>> + B(const B &, B = B());
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no matching constructor}} expected-note at -2 {{candidate}} expected-note at -2 {{here}}
>>> +#endif
>>> + };
>>> + struct C {
>>> + static C &f();
>>> + C(const C &, C = f()); // expected-error {{no matching constructor}} expected-note {{candidate}} expected-note {{here}}
>>> };
>>> }
>>>
>>> @@ -662,25 +669,33 @@ namespace dr58 { // dr58: yes
>>>
>>> namespace dr59 { // dr59: yes
>>> template<typename T> struct convert_to { operator T() const; };
>>> - struct A {}; // expected-note 2{{volatile qualifier}} expected-note 2{{requires 0 arguments}}
>>> - struct B : A {}; // expected-note 2{{volatile qualifier}} expected-note 2{{requires 0 arguments}}
>>> -#if __cplusplus >= 201103L // move constructors
>>> - // expected-note at -3 2{{volatile qualifier}}
>>> - // expected-note at -3 2{{volatile qualifier}}
>>> -#endif
>>> + struct A {}; // expected-note 5+{{candidate}}
>>> + struct B : A {}; // expected-note 0+{{candidate}}
>>>
>>> A a1 = convert_to<A>();
>>> A a2 = convert_to<A&>();
>>> A a3 = convert_to<const A>();
>>> - A a4 = convert_to<const volatile A>(); // expected-error {{no viable}}
>>> + A a4 = convert_to<const volatile A>();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no viable}}
>>> +#endif
>>> A a5 = convert_to<const volatile A&>(); // expected-error {{no viable}}
>>>
>>> B b1 = convert_to<B>();
>>> B b2 = convert_to<B&>();
>>> B b3 = convert_to<const B>();
>>> - B b4 = convert_to<const volatile B>(); // expected-error {{no viable}}
>>> + B b4 = convert_to<const volatile B>();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no viable}}
>>> +#endif
>>> B b5 = convert_to<const volatile B&>(); // expected-error {{no viable}}
>>>
>>> + A c1 = convert_to<B>();
>>> + A c2 = convert_to<B&>();
>>> + A c3 = convert_to<const B>();
>>> + A c4 = convert_to<const volatile B>(); // expected-error {{no viable}}
>>> + A c5 = convert_to<const volatile B&>(); // expected-error {{no viable}}
>>> +
>>> int n1 = convert_to<int>();
>>> int n2 = convert_to<int&>();
>>> int n3 = convert_to<const int>();
>>> @@ -920,14 +935,17 @@ namespace dr84 { // dr84: yes
>>> struct A { operator B() const; };
>>> struct C {};
>>> struct B {
>>> - B(B&); // expected-note {{candidate}}
>>> - B(C); // expected-note {{no known conversion from 'dr84::B' to 'dr84::C'}}
>>> + B(B&); // expected-note 0-1{{candidate}}
>>> + B(C); // expected-note 0-1{{no known conversion from 'dr84::B' to 'dr84::C'}}
>>> operator C() const;
>>> };
>>> A a;
>>> // Cannot use B(C) / operator C() pair to construct the B from the B temporary
>>> - // here.
>>> - B b = a; // expected-error {{no viable}}
>>> + // here. In C++1z, we initialize the B object directly using 'A::operator B()'.
>>> + B b = a;
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no viable}}
>>> +#endif
>>> }
>>>
>>> namespace dr85 { // dr85: yes
>>>
>>> Modified: cfe/trunk/test/CXX/drs/dr10xx.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/drs/dr10xx.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/CXX/drs/dr10xx.cpp (original)
>>> +++ cfe/trunk/test/CXX/drs/dr10xx.cpp Tue Dec 6 17:52:28 2016
>>> @@ -3,8 +3,6 @@
>>> // RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
>>> // RUN: %clang_cc1 -std=c++1z %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
>>>
>>> -// expected-no-diagnostics
>>> -
>>> namespace std {
>>> __extension__ typedef __SIZE_TYPE__ size_t;
>>>
>>> @@ -32,6 +30,18 @@ namespace dr1048 { // dr1048: 3.6
>>> #endif
>>> }
>>>
>>> +namespace dr1054 { // dr1054: no
>>> + // FIXME: Test is incomplete.
>>> + struct A {} volatile a;
>>> + void f() {
>>> + // FIXME: This is wrong: an lvalue-to-rvalue conversion is applied here,
>>> + // which copy-initializes a temporary from 'a'. Therefore this is
>>> + // ill-formed because A does not have a volatile copy constructor.
>>> + // (We might want to track this aspect under dr1383 instead?)
>>> + a; // expected-warning {{assign into a variable to force a volatile load}}
>>> + }
>>> +}
>>> +
>>> namespace dr1070 { // dr1070: 3.5
>>> #if __cplusplus >= 201103L
>>> struct A {
>>>
>>> Modified: cfe/trunk/test/CXX/drs/dr1xx.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/drs/dr1xx.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/CXX/drs/dr1xx.cpp (original)
>>> +++ cfe/trunk/test/CXX/drs/dr1xx.cpp Tue Dec 6 17:52:28 2016
>>> @@ -576,11 +576,18 @@ namespace dr151 { // dr151: yes
>>>
>>> namespace dr152 { // dr152: yes
>>> struct A {
>>> - A(); // expected-note {{not viable}}
>>> + A(); // expected-note 0-2{{not viable}}
>>> explicit A(const A&);
>>> };
>>> - A a1 = A(); // expected-error {{no matching constructor}}
>>> + A a1 = A();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no matching constructor}}
>>> +#endif
>>> A a2((A()));
>>> +
>>> + A &f();
>>> + A a3 = f(); // expected-error {{no matching constructor}}
>>> + A a4(f());
>>> }
>>>
>>> // dr153: na
>>> @@ -823,11 +830,20 @@ namespace dr176 { // dr176: yes
>>> namespace dr177 { // dr177: yes
>>> struct B {};
>>> struct A {
>>> - A(A &); // expected-note {{not viable: expects an l-value}}
>>> - A(const B &); // expected-note {{not viable: no known conversion from 'dr177::A' to}}
>>> + A(A &); // expected-note 0-1{{not viable: expects an l-value}}
>>> + A(const B &); // expected-note 0-1{{not viable: no known conversion from 'dr177::A' to}}
>>> };
>>> B b;
>>> - A a = b; // expected-error {{no viable constructor copying variable}}
>>> + A a = b;
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{no viable constructor copying variable}}
>>> +#endif
>>> +
>>> + struct C { C(C&); }; // expected-note {{not viable: no known conversion from 'dr177::D' to 'dr177::C &'}}
>>> + struct D : C {};
>>> + struct E { operator D(); };
>>> + E e;
>>> + C c = e; // expected-error {{no viable constructor copying variable of type 'dr177::D'}}
>>> }
>>>
>>> namespace dr178 { // dr178: yes
>>>
>>> Modified: cfe/trunk/test/CXX/drs/dr4xx.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/drs/dr4xx.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/CXX/drs/dr4xx.cpp (original)
>>> +++ cfe/trunk/test/CXX/drs/dr4xx.cpp Tue Dec 6 17:52:28 2016
>>> @@ -553,12 +553,21 @@ namespace dr446 { // dr446: yes
>>> void(b ? a : a);
>>> b ? A() : a; // expected-error {{deleted}}
>>> b ? a : A(); // expected-error {{deleted}}
>>> - b ? A() : A(); // expected-error {{deleted}}
>>> + b ? A() : A();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{deleted}}
>>> +#endif
>>>
>>> void(b ? a : c);
>>> b ? a : C(); // expected-error {{deleted}}
>>> - b ? c : A(); // expected-error {{deleted}}
>>> - b ? A() : C(); // expected-error {{deleted}}
>>> + b ? c : A();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{deleted}}
>>> +#endif
>>> + b ? A() : C();
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{deleted}}
>>> +#endif
>>> }
>>> }
>>>
>>> @@ -874,10 +883,12 @@ namespace dr479 { // dr479: yes
>>> void f() {
>>> throw S();
>>> // expected-error at -1 {{temporary of type 'dr479::S' has private destructor}}
>>> - // expected-error at -2 {{calling a private constructor}}
>>> - // expected-error at -3 {{exception object of type 'dr479::S' has private destructor}}
>>> + // expected-error at -2 {{exception object of type 'dr479::S' has private destructor}}
>>> #if __cplusplus < 201103L
>>> - // expected-error at -5 {{C++98 requires an accessible copy constructor}}
>>> + // expected-error at -4 {{C++98 requires an accessible copy constructor}}
>>> +#endif
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -7 {{calling a private constructor}} (copy ctor)
>>> #endif
>>> }
>>> void g() {
>>>
>>> Added: cfe/trunk/test/CodeGenCXX/cxx1z-copy-omission.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/cxx1z-copy-omission.cpp?rev=288866&view=auto
>>> ==============================================================================
>>> --- cfe/trunk/test/CodeGenCXX/cxx1z-copy-omission.cpp (added)
>>> +++ cfe/trunk/test/CodeGenCXX/cxx1z-copy-omission.cpp Tue Dec 6 17:52:28 2016
>>> @@ -0,0 +1,81 @@
>>> +// RUN: %clang_cc1 -std=c++1z -emit-llvm -triple x86_64-linux-gnu -o - %s | FileCheck %s
>>> +
>>> +struct A {
>>> + A(int);
>>> + A(A&&);
>>> + A(const A&);
>>> + ~A();
>>> +
>>> + int arr[10];
>>> +};
>>> +
>>> +A f();
>>> +void h();
>>> +
>>> +// CHECK-LABEL: define {{.*}} @_Z1gv(
>>> +void g() {
>>> + // CHECK: %[[A:.*]] = alloca
>>> + // CHECK-NOT: alloca
>>> + // CHECK-NOT: call
>>> + // CHECK: call {{.*}} @_Z1fv({{.*}}* sret %[[A]])
>>> + A a = A( A{ f() } );
>>> + // CHECK-NOT: call
>>> +
>>> + // CHECK: call void @_Z1hv(
>>> + h();
>>> + // CHECK-NOT: call
>>> +
>>> + // CHECK: call void @_ZN1AD1Ev({{.*}}* %[[A]])
>>> + // CHECK-NOT: call
>>> + // CHECK-LABEL: }
>>> +}
>>> +
>>> +void f(A);
>>> +
>>> +// CHECK-LABEL: define {{.*}} @_Z1hv(
>>> +void h() {
>>> + // CHECK: %[[A:.*]] = alloca
>>> + // CHECK-NOT: alloca
>>> + // CHECK-NOT: call
>>> +
>>> + // CHECK: call {{.*}} @_Z1fv({{.*}}* sret %[[A]])
>>> + // CHECK-NOT: call
>>> + // CHECK: call {{.*}} @_Z1f1A({{.*}}* %[[A]])
>>> + f(f());
>>> + // CHECK-NOT: call
>>> + // CHECK: call void @_ZN1AD1Ev({{.*}}* %[[A]])
>>> +
>>> + // CHECK: call void @_Z1hv(
>>> + h();
>>> +
>>> + // CHECK-NOT: call
>>> + // CHECK-LABEL: }
>>> +}
>>> +
>>> +// We still pass classes with trivial copy/move constructors and destructors in
>>> +// registers, even if the copy is formally omitted.
>>> +struct B {
>>> + B(int);
>>> + int n;
>>> +};
>>> +
>>> +B fB();
>>> +void fB(B);
>>> +
>>> +// CHECK-LABEL: define {{.*}} @_Z1iv(
>>> +void i() {
>>> + // CHECK: %[[B:.*]] = alloca
>>> + // CHECK-NOT: alloca
>>> + // CHECK-NOT: call
>>> +
>>> + // CHECK: %[[B_N:.*]] = call i32 @_Z2fBv()
>>> + // CHECK-NOT: call
>>> + // CHECK: store i32 %[[B_N]],
>>> + // CHECK-NOT: call
>>> + // CHECK: %[[B_N:.*]] = load i32
>>> + // CHECK-NOT: call
>>> + // CHECK: call void @_Z2fB1B(i32 %[[B_N]])
>>> + fB(fB());
>>> +
>>> + // CHECK-LABEL: }
>>> +}
>>>
>>> Modified: cfe/trunk/test/SemaCXX/aggregate-initialization.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/aggregate-initialization.cpp?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/test/SemaCXX/aggregate-initialization.cpp (original)
>>> +++ cfe/trunk/test/SemaCXX/aggregate-initialization.cpp Tue Dec 6 17:52:28 2016
>>> @@ -57,7 +57,7 @@ struct A {
>>> A(int);
>>> ~A();
>>>
>>> - A(const A&) = delete; // expected-note 2 {{'A' has been explicitly marked deleted here}}
>>> + A(const A&) = delete; // expected-note 0-2{{'A' has been explicitly marked deleted here}}
>>> };
>>>
>>> struct B {
>>> @@ -70,10 +70,16 @@ struct C {
>>>
>>> void f() {
>>> A as1[1] = { };
>>> - A as2[1] = { 1 }; // expected-error {{copying array element of type 'A' invokes deleted constructor}}
>>> + A as2[1] = { 1 };
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{copying array element of type 'A' invokes deleted constructor}}
>>> +#endif
>>>
>>> B b1 = { };
>>> - B b2 = { 1 }; // expected-error {{copying member subobject of type 'A' invokes deleted constructor}}
>>> + B b2 = { 1 };
>>> +#if __cplusplus <= 201402L
>>> + // expected-error at -2 {{copying member subobject of type 'A' invokes deleted constructor}}
>>> +#endif
>>>
>>> C c1 = { 1 };
>>> }
>>>
>>> Added: cfe/trunk/test/SemaCXX/cxx1z-copy-omission.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/cxx1z-copy-omission.cpp?rev=288866&view=auto
>>> ==============================================================================
>>> --- cfe/trunk/test/SemaCXX/cxx1z-copy-omission.cpp (added)
>>> +++ cfe/trunk/test/SemaCXX/cxx1z-copy-omission.cpp Tue Dec 6 17:52:28 2016
>>> @@ -0,0 +1,134 @@
>>> +// RUN: %clang_cc1 -std=c++1z -verify %s
>>> +
>>> +struct Noncopyable {
>>> + Noncopyable();
>>> + Noncopyable(const Noncopyable &) = delete; // expected-note 1+{{deleted}}
>>> + virtual ~Noncopyable();
>>> +};
>>> +struct Derived : Noncopyable {};
>>> +struct NoncopyableAggr {
>>> + Noncopyable nc;
>>> +};
>>> +struct Indestructible {
>>> + Indestructible();
>>> + ~Indestructible() = delete; // expected-note 1+{{deleted}}
>>> +};
>>> +struct Incomplete; // expected-note 1+{{declar}}
>>> +
>>> +Noncopyable make(int kind = 0) {
>>> + switch (kind) {
>>> + case 0: return {};
>>> + case 1: return Noncopyable();
>>> + case 2: return Noncopyable{};
>>> + case 3: return make();
>>> + }
>>> + __builtin_unreachable();
>>> +}
>>> +
>>> +Indestructible make_indestructible();
>>> +Incomplete make_incomplete(); // expected-note 1+{{here}}
>>> +
>>> +void take(Noncopyable nc) {}
>>> +
>>> +Noncopyable nrvo() {
>>> + Noncopyable nrvo;
>>> + return nrvo; // expected-error {{deleted constructor}}
>>> +}
>>> +
>>> +Noncopyable nc1 = make();
>>> +Noncopyable nc2 = Noncopyable();
>>> +Noncopyable nc3 = Derived(); // expected-error {{deleted constructor}}
>>> +
>>> +NoncopyableAggr nca1 = NoncopyableAggr{};
>>> +NoncopyableAggr nca2 = NoncopyableAggr{{}};
>>> +NoncopyableAggr nca3 = NoncopyableAggr{NoncopyableAggr{Noncopyable()}};
>>> +
>>> +void test_expressions(bool b) {
>>> + auto lambda = [a = make()] {};
>>> +
>>> + take({});
>>> + take(Noncopyable());
>>> + take(Noncopyable{});
>>> + take(make());
>>> +
>>> + Noncopyable &&dc1 = dynamic_cast<Noncopyable&&>(Noncopyable());
>>> + Noncopyable &&dc2 = dynamic_cast<Noncopyable&&>(nc1);
>>> + Noncopyable &&dc3 = dynamic_cast<Noncopyable&&>(Derived());
>>> +
>>> + Noncopyable sc1 = static_cast<Noncopyable>(Noncopyable());
>>> + Noncopyable sc2 = static_cast<Noncopyable>(nc1); // expected-error {{deleted}}
>>> + Noncopyable sc3 = static_cast<Noncopyable&&>(Noncopyable()); // expected-error {{deleted}}
>>> + Noncopyable sc4 = static_cast<Noncopyable>(static_cast<Noncopyable&&>(Noncopyable())); // expected-error {{deleted}}
>>> +
>>> + Noncopyable cc1 = (Noncopyable)Noncopyable();
>>> + Noncopyable cc2 = (Noncopyable)Derived(); // expected-error {{deleted}}
>>> +
>>> + Noncopyable fc1 = Noncopyable(Noncopyable());
>>> + Noncopyable fc2 = Noncopyable(Derived()); // expected-error {{deleted}}
>>> +
>>> + // We must check for a complete type for every materialized temporary. (Note
>>> + // that in the special case of the top level of a decltype, no temporary is
>>> + // materialized.)
>>> + make_incomplete(); // expected-error {{incomplete}}
>>> + make_incomplete().a; // expected-error {{incomplete}}
>>> + make_incomplete().*(int Incomplete::*)nullptr; // expected-error {{incomplete}}
>>> + dynamic_cast<Incomplete&&>(make_incomplete()); // expected-error {{incomplete}}
>>> + const_cast<Incomplete&&>(make_incomplete()); // expected-error {{incomplete}}
>>> +
>>> + sizeof(Indestructible{}); // expected-error {{deleted}}
>>> + sizeof(make_indestructible()); // expected-error {{deleted}}
>>> + sizeof(make_incomplete()); // expected-error {{incomplete}}
>>> + typeid(Indestructible{}); // expected-error {{deleted}}
>>> + typeid(make_indestructible()); // expected-error {{deleted}}
>>> + typeid(make_incomplete()); // expected-error {{incomplete}}
>>> +
>>> + // FIXME: The first two cases here are now also valid in C++17 onwards.
>>> + using I = decltype(Indestructible()); // expected-error {{deleted}}
>>> + using I = decltype(Indestructible{}); // expected-error {{deleted}}
>>> + using I = decltype(make_indestructible());
>>> + using J = decltype(make_incomplete());
>>> +
>>> + Noncopyable cond1 = b ? Noncopyable() : make();
>>> + Noncopyable cond2 = b ? Noncopyable() : Derived(); // expected-error {{incompatible}}
>>> + Noncopyable cond3 = b ? Derived() : Noncopyable(); // expected-error {{incompatible}}
>>> + Noncopyable cond4 = b ? Noncopyable() : nc1; // expected-error {{deleted}}
>>> + Noncopyable cond5 = b ? nc1 : Noncopyable(); // expected-error {{deleted}}
>>> + // Could convert both to an xvalue of type Noncopyable here, but we're not
>>> + // permitted to consider that.
>>> + Noncopyable &&cond6 = b ? Noncopyable() : Derived(); // expected-error {{incompatible}}
>>> + Noncopyable &&cond7 = b ? Derived() : Noncopyable(); // expected-error {{incompatible}}
>>> + // Could convert both to a const lvalue of type Noncopyable here, but we're
>>> + // not permitted to consider that, either.
>>> + const Noncopyable cnc;
>>> + const Noncopyable &cond8 = b ? cnc : Derived(); // expected-error {{incompatible}}
>>> + const Noncopyable &cond9 = b ? Derived() : cnc; // expected-error {{incompatible}}
>>> +
>>> + extern const volatile Noncopyable make_cv();
>>> + Noncopyable cv_difference1 = make_cv();
>>> + const volatile Noncopyable cv_difference2 = make();
>>> +}
>>> +
>>> +template<typename T> struct ConversionFunction { operator T(); };
>>> +Noncopyable cf1 = ConversionFunction<Noncopyable>();
>>> +Noncopyable cf2 = ConversionFunction<Noncopyable&&>(); // expected-error {{deleted}}
>>> +Noncopyable cf3 = ConversionFunction<const volatile Noncopyable>();
>>> +const volatile Noncopyable cf4 = ConversionFunction<Noncopyable>();
>>> +Noncopyable cf5 = ConversionFunction<Derived>(); // expected-error {{deleted}}
>>> +
>>> +struct AsMember {
>>> + Noncopyable member;
>>> + AsMember() : member(make()) {}
>>> +};
>>> +// FIXME: DR (no number yet): we still get a copy for base or delegating construction.
>>> +struct AsBase : Noncopyable {
>>> + AsBase() : Noncopyable(make()) {} // expected-error {{deleted}}
>>> +};
>>> +struct AsDelegating final {
>>> + AsDelegating(const AsDelegating &) = delete;
>>> + static AsDelegating make(int);
>>> +
>>> + // The base constructor version of this is problematic; the complete object
>>> + // version would be OK. Perhaps we could allow copy omission here for final
>>> + // classes?
>>> + AsDelegating(int n) : AsDelegating(make(n)) {} // expected-error {{deleted}}
>>> +};
>>>
>>> Modified: cfe/trunk/www/cxx_dr_status.html
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/www/cxx_dr_status.html?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/www/cxx_dr_status.html (original)
>>> +++ cfe/trunk/www/cxx_dr_status.html Tue Dec 6 17:52:28 2016
>>> @@ -6139,7 +6139,7 @@ and <I>POD class</I></td>
>>> <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1054">1054</a></td>
>>> <td>C++11</td>
>>> <td>Lvalue-to-rvalue conversions in expression statements</td>
>>> - <td class="none" align="center">Unknown</td>
>>> + <td class="none" align="center">No</td>
>>> </tr>
>>> <tr id="1055">
>>> <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1055">1055</a></td>
>>>
>>> Modified: cfe/trunk/www/cxx_status.html
>>> URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/www/cxx_status.html?rev=288866&r1=288865&r2=288866&view=diff
>>> ==============================================================================
>>> --- cfe/trunk/www/cxx_status.html (original)
>>> +++ cfe/trunk/www/cxx_status.html Tue Dec 6 17:52:28 2016
>>> @@ -694,7 +694,7 @@ as the draft C++1z standard evolves.
>>> <tr>
>>> <td>Guaranteed copy elision</td>
>>> <td><a href="http://wg21.link/p0135r1">P0135R1</a></td>
>>> - <td class="none" align="center">No</td>
>>> + <td class="svn" align="center">SVN</td>
>>> </tr>
>>> <tr>
>>> <td rowspan=2>Stricter expression evaluation order</td>
>>>
>>>
>>> _______________________________________________
>>> cfe-commits mailing list
>>> cfe-commits at lists.llvm.org
>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
>>
>
> _______________________________________________
> cfe-commits mailing list
> cfe-commits at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
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