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-rw-r--r--contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp810
1 files changed, 590 insertions, 220 deletions
diff --git a/contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp b/contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp
index 31f581d..1caa94c 100644
--- a/contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp
+++ b/contrib/llvm/tools/clang/lib/Sema/SemaOverload.cpp
@@ -38,6 +38,11 @@
using namespace clang;
using namespace sema;
+static bool functionHasPassObjectSizeParams(const FunctionDecl *FD) {
+ return std::any_of(FD->param_begin(), FD->param_end(),
+ std::mem_fn(&ParmVarDecl::hasAttr<PassObjectSizeAttr>));
+}
+
/// A convenience routine for creating a decayed reference to a function.
static ExprResult
CreateFunctionRefExpr(Sema &S, FunctionDecl *Fn, NamedDecl *FoundDecl,
@@ -60,12 +65,8 @@ CreateFunctionRefExpr(Sema &S, FunctionDecl *Fn, NamedDecl *FoundDecl,
DRE->setHadMultipleCandidates(true);
S.MarkDeclRefReferenced(DRE);
-
- ExprResult E = DRE;
- E = S.DefaultFunctionArrayConversion(E.get());
- if (E.isInvalid())
- return ExprError();
- return E;
+ return S.ImpCastExprToType(DRE, S.Context.getPointerType(DRE->getType()),
+ CK_FunctionToPointerDecay);
}
static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
@@ -88,7 +89,7 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
static ImplicitConversionSequence::CompareKind
-CompareStandardConversionSequences(Sema &S,
+CompareStandardConversionSequences(Sema &S, SourceLocation Loc,
const StandardConversionSequence& SCS1,
const StandardConversionSequence& SCS2);
@@ -98,7 +99,7 @@ CompareQualificationConversions(Sema &S,
const StandardConversionSequence& SCS2);
static ImplicitConversionSequence::CompareKind
-CompareDerivedToBaseConversions(Sema &S,
+CompareDerivedToBaseConversions(Sema &S, SourceLocation Loc,
const StandardConversionSequence& SCS1,
const StandardConversionSequence& SCS2);
@@ -130,7 +131,11 @@ ImplicitConversionRank clang::GetConversionRank(ImplicitConversionKind Kind) {
ICR_Complex_Real_Conversion,
ICR_Conversion,
ICR_Conversion,
- ICR_Writeback_Conversion
+ ICR_Writeback_Conversion,
+ ICR_Exact_Match, // NOTE(gbiv): This may not be completely right --
+ // it was omitted by the patch that added
+ // ICK_Zero_Event_Conversion
+ ICR_C_Conversion
};
return Rank[(int)Kind];
}
@@ -162,7 +167,9 @@ static const char* GetImplicitConversionName(ImplicitConversionKind Kind) {
"Complex-real conversion",
"Block Pointer conversion",
"Transparent Union Conversion",
- "Writeback conversion"
+ "Writeback conversion",
+ "OpenCL Zero Event Conversion",
+ "C specific type conversion"
};
return Name[Kind];
}
@@ -896,6 +903,11 @@ Sema::CheckOverload(Scope *S, FunctionDecl *New, const LookupResult &Old,
OldD = cast<UsingShadowDecl>(OldD)->getTargetDecl();
}
+ // A using-declaration does not conflict with another declaration
+ // if one of them is hidden.
+ if ((OldIsUsingDecl || NewIsUsingDecl) && !isVisible(*I))
+ continue;
+
// If either declaration was introduced by a using declaration,
// we'll need to use slightly different rules for matching.
// Essentially, these rules are the normal rules, except that
@@ -1051,6 +1063,14 @@ bool Sema::IsOverload(FunctionDecl *New, FunctionDecl *Old,
return true;
}
+ // Though pass_object_size is placed on parameters and takes an argument, we
+ // consider it to be a function-level modifier for the sake of function
+ // identity. Either the function has one or more parameters with
+ // pass_object_size or it doesn't.
+ if (functionHasPassObjectSizeParams(New) !=
+ functionHasPassObjectSizeParams(Old))
+ return true;
+
// enable_if attributes are an order-sensitive part of the signature.
for (specific_attr_iterator<EnableIfAttr>
NewI = New->specific_attr_begin<EnableIfAttr>(),
@@ -1067,6 +1087,25 @@ bool Sema::IsOverload(FunctionDecl *New, FunctionDecl *Old,
return true;
}
+ if (getLangOpts().CUDA && getLangOpts().CUDATargetOverloads) {
+ CUDAFunctionTarget NewTarget = IdentifyCUDATarget(New),
+ OldTarget = IdentifyCUDATarget(Old);
+ if (NewTarget == CFT_InvalidTarget || NewTarget == CFT_Global)
+ return false;
+
+ assert((OldTarget != CFT_InvalidTarget) && "Unexpected invalid target.");
+
+ // Don't allow mixing of HD with other kinds. This guarantees that
+ // we have only one viable function with this signature on any
+ // side of CUDA compilation .
+ if ((NewTarget == CFT_HostDevice) || (OldTarget == CFT_HostDevice))
+ return false;
+
+ // Allow overloading of functions with same signature, but
+ // different CUDA target attributes.
+ return NewTarget != OldTarget;
+ }
+
// The signatures match; this is not an overload.
return false;
}
@@ -1125,7 +1164,8 @@ TryUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
QualType ToCanon
= S.Context.getCanonicalType(ToType).getUnqualifiedType();
if (Constructor->isCopyConstructor() &&
- (FromCanon == ToCanon || S.IsDerivedFrom(FromCanon, ToCanon))) {
+ (FromCanon == ToCanon ||
+ S.IsDerivedFrom(From->getLocStart(), FromCanon, ToCanon))) {
// Turn this into a "standard" conversion sequence, so that it
// gets ranked with standard conversion sequences.
ICS.setStandard();
@@ -1215,7 +1255,7 @@ TryImplicitConversion(Sema &S, Expr *From, QualType ToType,
QualType FromType = From->getType();
if (ToType->getAs<RecordType>() && FromType->getAs<RecordType>() &&
(S.Context.hasSameUnqualifiedType(FromType, ToType) ||
- S.IsDerivedFrom(FromType, ToType))) {
+ S.IsDerivedFrom(From->getLocStart(), FromType, ToType))) {
ICS.setStandard();
ICS.Standard.setAsIdentityConversion();
ICS.Standard.setFromType(FromType);
@@ -1387,7 +1427,7 @@ static bool tryAtomicConversion(Sema &S, Expr *From, QualType ToType,
bool InOverloadResolution,
StandardConversionSequence &SCS,
bool CStyle);
-
+
/// IsStandardConversion - Determines whether there is a standard
/// conversion sequence (C++ [conv], C++ [over.ics.scs]) from the
/// expression From to the type ToType. Standard conversion sequences
@@ -1410,13 +1450,10 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
SCS.CopyConstructor = nullptr;
// There are no standard conversions for class types in C++, so
- // abort early. When overloading in C, however, we do permit
- if (FromType->isRecordType() || ToType->isRecordType()) {
- if (S.getLangOpts().CPlusPlus)
- return false;
-
- // When we're overloading in C, we allow, as standard conversions,
- }
+ // abort early. When overloading in C, however, we do permit them.
+ if (S.getLangOpts().CPlusPlus &&
+ (FromType->isRecordType() || ToType->isRecordType()))
+ return false;
// The first conversion can be an lvalue-to-rvalue conversion,
// array-to-pointer conversion, or function-to-pointer conversion
@@ -1521,6 +1558,11 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
// Function-to-pointer conversion (C++ 4.3).
SCS.First = ICK_Function_To_Pointer;
+ if (auto *DRE = dyn_cast<DeclRefExpr>(From->IgnoreParenCasts()))
+ if (auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl()))
+ if (!S.checkAddressOfFunctionIsAvailable(FD))
+ return false;
+
// An lvalue of function type T can be converted to an rvalue of
// type "pointer to T." The result is a pointer to the
// function. (C++ 4.3p1).
@@ -1625,9 +1667,9 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
// tryAtomicConversion has updated the standard conversion sequence
// appropriately.
return true;
- } else if (ToType->isEventT() &&
+ } else if (ToType->isEventT() &&
From->isIntegerConstantExpr(S.getASTContext()) &&
- (From->EvaluateKnownConstInt(S.getASTContext()) == 0)) {
+ From->EvaluateKnownConstInt(S.getASTContext()) == 0) {
SCS.Second = ICK_Zero_Event_Conversion;
FromType = ToType;
} else {
@@ -1666,11 +1708,28 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
}
SCS.setToType(2, FromType);
+ if (CanonFrom == CanonTo)
+ return true;
+
// If we have not converted the argument type to the parameter type,
- // this is a bad conversion sequence.
- if (CanonFrom != CanonTo)
+ // this is a bad conversion sequence, unless we're resolving an overload in C.
+ if (S.getLangOpts().CPlusPlus || !InOverloadResolution)
+ return false;
+
+ ExprResult ER = ExprResult{From};
+ auto Conv = S.CheckSingleAssignmentConstraints(ToType, ER,
+ /*Diagnose=*/false,
+ /*DiagnoseCFAudited=*/false,
+ /*ConvertRHS=*/false);
+ if (Conv != Sema::Compatible)
return false;
+ SCS.setAllToTypes(ToType);
+ // We need to set all three because we want this conversion to rank terribly,
+ // and we don't know what conversions it may overlap with.
+ SCS.First = ICK_C_Only_Conversion;
+ SCS.Second = ICK_C_Only_Conversion;
+ SCS.Third = ICK_C_Only_Conversion;
return true;
}
@@ -1763,7 +1822,7 @@ bool Sema::IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType) {
// We have already pre-calculated the promotion type, so this is trivial.
if (ToType->isIntegerType() &&
- !RequireCompleteType(From->getLocStart(), FromType, 0))
+ isCompleteType(From->getLocStart(), FromType))
return Context.hasSameUnqualifiedType(
ToType, FromEnumType->getDecl()->getPromotionType());
}
@@ -2060,7 +2119,7 @@ bool Sema::IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
}
// MSVC allows implicit function to void* type conversion.
- if (getLangOpts().MicrosoftExt && FromPointeeType->isFunctionType() &&
+ if (getLangOpts().MSVCCompat && FromPointeeType->isFunctionType() &&
ToPointeeType->isVoidType()) {
ConvertedType = BuildSimilarlyQualifiedPointerType(FromTypePtr,
ToPointeeType,
@@ -2094,8 +2153,7 @@ bool Sema::IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
if (getLangOpts().CPlusPlus &&
FromPointeeType->isRecordType() && ToPointeeType->isRecordType() &&
!Context.hasSameUnqualifiedType(FromPointeeType, ToPointeeType) &&
- !RequireCompleteType(From->getLocStart(), FromPointeeType, 0) &&
- IsDerivedFrom(FromPointeeType, ToPointeeType)) {
+ IsDerivedFrom(From->getLocStart(), FromPointeeType, ToPointeeType)) {
ConvertedType = BuildSimilarlyQualifiedPointerType(FromTypePtr,
ToPointeeType,
ToType, Context);
@@ -2467,6 +2525,18 @@ enum {
ft_qualifer_mismatch
};
+/// Attempts to get the FunctionProtoType from a Type. Handles
+/// MemberFunctionPointers properly.
+static const FunctionProtoType *tryGetFunctionProtoType(QualType FromType) {
+ if (auto *FPT = FromType->getAs<FunctionProtoType>())
+ return FPT;
+
+ if (auto *MPT = FromType->getAs<MemberPointerType>())
+ return MPT->getPointeeType()->getAs<FunctionProtoType>();
+
+ return nullptr;
+}
+
/// HandleFunctionTypeMismatch - Gives diagnostic information for differeing
/// function types. Catches different number of parameter, mismatch in
/// parameter types, and different return types.
@@ -2513,8 +2583,8 @@ void Sema::HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
return;
}
- const FunctionProtoType *FromFunction = FromType->getAs<FunctionProtoType>(),
- *ToFunction = ToType->getAs<FunctionProtoType>();
+ const FunctionProtoType *FromFunction = tryGetFunctionProtoType(FromType),
+ *ToFunction = tryGetFunctionProtoType(ToType);
// Both types need to be function types.
if (!FromFunction || !ToFunction) {
@@ -2621,6 +2691,14 @@ bool Sema::CheckPointerConversion(Expr *From, QualType ToType,
// The conversion was successful.
Kind = CK_DerivedToBase;
}
+
+ if (!IsCStyleOrFunctionalCast && FromPointeeType->isFunctionType() &&
+ ToPointeeType->isVoidType()) {
+ assert(getLangOpts().MSVCCompat &&
+ "this should only be possible with MSVCCompat!");
+ Diag(From->getExprLoc(), diag::ext_ms_impcast_fn_obj)
+ << From->getSourceRange();
+ }
}
} else if (const ObjCObjectPointerType *ToPtrType =
ToType->getAs<ObjCObjectPointerType>()) {
@@ -2681,8 +2759,7 @@ bool Sema::IsMemberPointerConversion(Expr *From, QualType FromType,
QualType ToClass(ToTypePtr->getClass(), 0);
if (!Context.hasSameUnqualifiedType(FromClass, ToClass) &&
- !RequireCompleteType(From->getLocStart(), ToClass, 0) &&
- IsDerivedFrom(ToClass, FromClass)) {
+ IsDerivedFrom(From->getLocStart(), ToClass, FromClass)) {
ConvertedType = Context.getMemberPointerType(FromTypePtr->getPointeeType(),
ToClass.getTypePtr());
return true;
@@ -2725,7 +2802,8 @@ bool Sema::CheckMemberPointerConversion(Expr *From, QualType ToType,
CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
/*DetectVirtual=*/true);
- bool DerivationOkay = IsDerivedFrom(ToClass, FromClass, Paths);
+ bool DerivationOkay =
+ IsDerivedFrom(From->getLocStart(), ToClass, FromClass, Paths);
assert(DerivationOkay &&
"Should not have been called if derivation isn't OK.");
(void)DerivationOkay;
@@ -3004,14 +3082,10 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
// the parentheses of the initializer.
if (S.Context.hasSameUnqualifiedType(ToType, From->getType()) ||
(From->getType()->getAs<RecordType>() &&
- S.IsDerivedFrom(From->getType(), ToType)))
+ S.IsDerivedFrom(From->getLocStart(), From->getType(), ToType)))
ConstructorsOnly = true;
- S.RequireCompleteType(From->getExprLoc(), ToType, 0);
- // RequireCompleteType may have returned true due to some invalid decl
- // during template instantiation, but ToType may be complete enough now
- // to try to recover.
- if (ToType->isIncompleteType()) {
+ if (!S.isCompleteType(From->getExprLoc(), ToType)) {
// We're not going to find any constructors.
} else if (CXXRecordDecl *ToRecordDecl
= dyn_cast<CXXRecordDecl>(ToRecordType->getDecl())) {
@@ -3085,7 +3159,7 @@ IsUserDefinedConversion(Sema &S, Expr *From, QualType ToType,
// Enumerate conversion functions, if we're allowed to.
if (ConstructorsOnly || isa<InitListExpr>(From)) {
- } else if (S.RequireCompleteType(From->getLocStart(), From->getType(), 0)) {
+ } else if (!S.isCompleteType(From->getLocStart(), From->getType())) {
// No conversion functions from incomplete types.
} else if (const RecordType *FromRecordType
= From->getType()->getAs<RecordType>()) {
@@ -3212,7 +3286,7 @@ Sema::DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType) {
diag::err_typecheck_nonviable_condition_incomplete,
From->getType(), From->getSourceRange()))
Diag(From->getLocStart(), diag::err_typecheck_nonviable_condition)
- << From->getType() << From->getSourceRange() << ToType;
+ << false << From->getType() << From->getSourceRange() << ToType;
} else
return false;
CandidateSet.NoteCandidates(*this, OCD_AllCandidates, From);
@@ -3264,7 +3338,7 @@ static bool hasDeprecatedStringLiteralToCharPtrConversion(
/// conversion sequences to determine whether one is better than the
/// other or if they are indistinguishable (C++ 13.3.3.2).
static ImplicitConversionSequence::CompareKind
-CompareImplicitConversionSequences(Sema &S,
+CompareImplicitConversionSequences(Sema &S, SourceLocation Loc,
const ImplicitConversionSequence& ICS1,
const ImplicitConversionSequence& ICS2)
{
@@ -3344,7 +3418,7 @@ CompareImplicitConversionSequences(Sema &S,
if (ICS1.isStandard())
// Standard conversion sequence S1 is a better conversion sequence than
// standard conversion sequence S2 if [...]
- Result = CompareStandardConversionSequences(S,
+ Result = CompareStandardConversionSequences(S, Loc,
ICS1.Standard, ICS2.Standard);
else if (ICS1.isUserDefined()) {
// User-defined conversion sequence U1 is a better conversion
@@ -3355,7 +3429,7 @@ CompareImplicitConversionSequences(Sema &S,
// U2 (C++ 13.3.3.2p3).
if (ICS1.UserDefined.ConversionFunction ==
ICS2.UserDefined.ConversionFunction)
- Result = CompareStandardConversionSequences(S,
+ Result = CompareStandardConversionSequences(S, Loc,
ICS1.UserDefined.After,
ICS2.UserDefined.After);
else
@@ -3453,7 +3527,7 @@ isBetterReferenceBindingKind(const StandardConversionSequence &SCS1,
/// conversion sequences to determine whether one is better than the
/// other or if they are indistinguishable (C++ 13.3.3.2p3).
static ImplicitConversionSequence::CompareKind
-CompareStandardConversionSequences(Sema &S,
+CompareStandardConversionSequences(Sema &S, SourceLocation Loc,
const StandardConversionSequence& SCS1,
const StandardConversionSequence& SCS2)
{
@@ -3509,7 +3583,7 @@ CompareStandardConversionSequences(Sema &S,
// Neither conversion sequence converts to a void pointer; compare
// their derived-to-base conversions.
if (ImplicitConversionSequence::CompareKind DerivedCK
- = CompareDerivedToBaseConversions(S, SCS1, SCS2))
+ = CompareDerivedToBaseConversions(S, Loc, SCS1, SCS2))
return DerivedCK;
} else if (SCS1ConvertsToVoid && SCS2ConvertsToVoid &&
!S.Context.hasSameType(SCS1.getFromType(), SCS2.getFromType())) {
@@ -3529,9 +3603,9 @@ CompareStandardConversionSequences(Sema &S,
QualType FromPointee1 = FromType1->getPointeeType().getUnqualifiedType();
QualType FromPointee2 = FromType2->getPointeeType().getUnqualifiedType();
- if (S.IsDerivedFrom(FromPointee2, FromPointee1))
+ if (S.IsDerivedFrom(Loc, FromPointee2, FromPointee1))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(FromPointee1, FromPointee2))
+ else if (S.IsDerivedFrom(Loc, FromPointee1, FromPointee2))
return ImplicitConversionSequence::Worse;
// Objective-C++: If one interface is more specific than the
@@ -3739,7 +3813,7 @@ CompareQualificationConversions(Sema &S,
/// [over.ics.rank]p4b3). As part of these checks, we also look at
/// conversions between Objective-C interface types.
static ImplicitConversionSequence::CompareKind
-CompareDerivedToBaseConversions(Sema &S,
+CompareDerivedToBaseConversions(Sema &S, SourceLocation Loc,
const StandardConversionSequence& SCS1,
const StandardConversionSequence& SCS2) {
QualType FromType1 = SCS1.getFromType();
@@ -3782,17 +3856,17 @@ CompareDerivedToBaseConversions(Sema &S,
// -- conversion of C* to B* is better than conversion of C* to A*,
if (FromPointee1 == FromPointee2 && ToPointee1 != ToPointee2) {
- if (S.IsDerivedFrom(ToPointee1, ToPointee2))
+ if (S.IsDerivedFrom(Loc, ToPointee1, ToPointee2))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(ToPointee2, ToPointee1))
+ else if (S.IsDerivedFrom(Loc, ToPointee2, ToPointee1))
return ImplicitConversionSequence::Worse;
}
// -- conversion of B* to A* is better than conversion of C* to A*,
if (FromPointee1 != FromPointee2 && ToPointee1 == ToPointee2) {
- if (S.IsDerivedFrom(FromPointee2, FromPointee1))
+ if (S.IsDerivedFrom(Loc, FromPointee2, FromPointee1))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(FromPointee1, FromPointee2))
+ else if (S.IsDerivedFrom(Loc, FromPointee1, FromPointee2))
return ImplicitConversionSequence::Worse;
}
} else if (SCS1.Second == ICK_Pointer_Conversion &&
@@ -3889,16 +3963,16 @@ CompareDerivedToBaseConversions(Sema &S,
QualType ToPointee2 = QualType(ToPointeeType2, 0).getUnqualifiedType();
// conversion of A::* to B::* is better than conversion of A::* to C::*,
if (FromPointee1 == FromPointee2 && ToPointee1 != ToPointee2) {
- if (S.IsDerivedFrom(ToPointee1, ToPointee2))
+ if (S.IsDerivedFrom(Loc, ToPointee1, ToPointee2))
return ImplicitConversionSequence::Worse;
- else if (S.IsDerivedFrom(ToPointee2, ToPointee1))
+ else if (S.IsDerivedFrom(Loc, ToPointee2, ToPointee1))
return ImplicitConversionSequence::Better;
}
// conversion of B::* to C::* is better than conversion of A::* to C::*
if (ToPointee1 == ToPointee2 && FromPointee1 != FromPointee2) {
- if (S.IsDerivedFrom(FromPointee1, FromPointee2))
+ if (S.IsDerivedFrom(Loc, FromPointee1, FromPointee2))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(FromPointee2, FromPointee1))
+ else if (S.IsDerivedFrom(Loc, FromPointee2, FromPointee1))
return ImplicitConversionSequence::Worse;
}
}
@@ -3910,9 +3984,9 @@ CompareDerivedToBaseConversions(Sema &S,
// reference of type A&,
if (S.Context.hasSameUnqualifiedType(FromType1, FromType2) &&
!S.Context.hasSameUnqualifiedType(ToType1, ToType2)) {
- if (S.IsDerivedFrom(ToType1, ToType2))
+ if (S.IsDerivedFrom(Loc, ToType1, ToType2))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(ToType2, ToType1))
+ else if (S.IsDerivedFrom(Loc, ToType2, ToType1))
return ImplicitConversionSequence::Worse;
}
@@ -3922,9 +3996,9 @@ CompareDerivedToBaseConversions(Sema &S,
// reference of type A&,
if (!S.Context.hasSameUnqualifiedType(FromType1, FromType2) &&
S.Context.hasSameUnqualifiedType(ToType1, ToType2)) {
- if (S.IsDerivedFrom(FromType2, FromType1))
+ if (S.IsDerivedFrom(Loc, FromType2, FromType1))
return ImplicitConversionSequence::Better;
- else if (S.IsDerivedFrom(FromType1, FromType2))
+ else if (S.IsDerivedFrom(Loc, FromType1, FromType2))
return ImplicitConversionSequence::Worse;
}
}
@@ -3973,9 +4047,9 @@ Sema::CompareReferenceRelationship(SourceLocation Loc,
ObjCLifetimeConversion = false;
if (UnqualT1 == UnqualT2) {
// Nothing to do.
- } else if (!RequireCompleteType(Loc, OrigT2, 0) &&
+ } else if (isCompleteType(Loc, OrigT2) &&
isTypeValid(UnqualT1) && isTypeValid(UnqualT2) &&
- IsDerivedFrom(UnqualT2, UnqualT1))
+ IsDerivedFrom(Loc, UnqualT2, UnqualT1))
DerivedToBase = true;
else if (UnqualT1->isObjCObjectOrInterfaceType() &&
UnqualT2->isObjCObjectOrInterfaceType() &&
@@ -4240,7 +4314,7 @@ TryReferenceInit(Sema &S, Expr *Init, QualType DeclType,
// conversion functions (13.3.1.6) and choosing the best
// one through overload resolution (13.3)),
if (!SuppressUserConversions && T2->isRecordType() &&
- !S.RequireCompleteType(DeclLoc, T2, 0) &&
+ S.isCompleteType(DeclLoc, T2) &&
RefRelationship == Sema::Ref_Incompatible) {
if (FindConversionForRefInit(S, ICS, DeclType, DeclLoc,
Init, T2, /*AllowRvalues=*/false,
@@ -4303,7 +4377,7 @@ TryReferenceInit(Sema &S, Expr *Init, QualType DeclType,
// in the second case (or, in either case, to an appropriate base
// class subobject).
if (!SuppressUserConversions && RefRelationship == Sema::Ref_Incompatible &&
- T2->isRecordType() && !S.RequireCompleteType(DeclLoc, T2, 0) &&
+ T2->isRecordType() && S.isCompleteType(DeclLoc, T2) &&
FindConversionForRefInit(S, ICS, DeclType, DeclLoc,
Init, T2, /*AllowRvalues=*/true,
AllowExplicit)) {
@@ -4441,7 +4515,7 @@ TryListConversion(Sema &S, InitListExpr *From, QualType ToType,
// We need a complete type for what follows. Incomplete types can never be
// initialized from init lists.
- if (S.RequireCompleteType(From->getLocStart(), ToType, 0))
+ if (!S.isCompleteType(From->getLocStart(), ToType))
return Result;
// Per DR1467:
@@ -4458,7 +4532,7 @@ TryListConversion(Sema &S, InitListExpr *From, QualType ToType,
if (ToType->isRecordType()) {
QualType InitType = From->getInit(0)->getType();
if (S.Context.hasSameUnqualifiedType(InitType, ToType) ||
- S.IsDerivedFrom(InitType, ToType))
+ S.IsDerivedFrom(From->getLocStart(), InitType, ToType))
return TryCopyInitialization(S, From->getInit(0), ToType,
SuppressUserConversions,
InOverloadResolution,
@@ -4515,7 +4589,8 @@ TryListConversion(Sema &S, InitListExpr *From, QualType ToType,
}
// Otherwise, look for the worst conversion.
if (Result.isBad() ||
- CompareImplicitConversionSequences(S, ICS, Result) ==
+ CompareImplicitConversionSequences(S, From->getLocStart(), ICS,
+ Result) ==
ImplicitConversionSequence::Worse)
Result = ICS;
}
@@ -4722,7 +4797,7 @@ static bool TryCopyInitialization(const CanQualType FromQTy,
/// parameter of the given member function (@c Method) from the
/// expression @p From.
static ImplicitConversionSequence
-TryObjectArgumentInitialization(Sema &S, QualType FromType,
+TryObjectArgumentInitialization(Sema &S, SourceLocation Loc, QualType FromType,
Expr::Classification FromClassification,
CXXMethodDecl *Method,
CXXRecordDecl *ActingContext) {
@@ -4782,7 +4857,7 @@ TryObjectArgumentInitialization(Sema &S, QualType FromType,
ImplicitConversionKind SecondKind;
if (ClassTypeCanon == FromTypeCanon.getLocalUnqualifiedType()) {
SecondKind = ICK_Identity;
- } else if (S.IsDerivedFrom(FromType, ClassType))
+ } else if (S.IsDerivedFrom(Loc, FromType, ClassType))
SecondKind = ICK_Derived_To_Base;
else {
ICS.setBad(BadConversionSequence::unrelated_class,
@@ -4857,7 +4932,8 @@ Sema::PerformObjectArgumentInitialization(Expr *From,
// Note that we always use the true parent context when performing
// the actual argument initialization.
ImplicitConversionSequence ICS = TryObjectArgumentInitialization(
- *this, From->getType(), FromClassification, Method, Method->getParent());
+ *this, From->getLocStart(), From->getType(), FromClassification, Method,
+ Method->getParent());
if (ICS.isBad()) {
if (ICS.Bad.Kind == BadConversionSequence::bad_qualifiers) {
Qualifiers FromQs = FromRecordType.getQualifiers();
@@ -4969,6 +5045,7 @@ static bool CheckConvertedConstantConversions(Sema &S,
case ICK_TransparentUnionConversion:
case ICK_Writeback_Conversion:
case ICK_Zero_Event_Conversion:
+ case ICK_C_Only_Conversion:
return false;
case ICK_Lvalue_To_Rvalue:
@@ -5372,14 +5449,15 @@ ExprResult Sema::PerformContextualImplicitConversion(
Expr *From;
TypeDiagnoserPartialDiag(ContextualImplicitConverter &Converter, Expr *From)
- : TypeDiagnoser(Converter.Suppress), Converter(Converter), From(From) {}
+ : Converter(Converter), From(From) {}
void diagnose(Sema &S, SourceLocation Loc, QualType T) override {
Converter.diagnoseIncomplete(S, Loc, T) << From->getSourceRange();
}
} IncompleteDiagnoser(Converter, From);
- if (RequireCompleteType(Loc, T, IncompleteDiagnoser))
+ if (Converter.Suppress ? !isCompleteType(Loc, T)
+ : RequireCompleteType(Loc, T, IncompleteDiagnoser))
return From;
// Look for a conversion to an integral or enumeration type.
@@ -5637,10 +5715,10 @@ Sema::AddOverloadCandidate(FunctionDecl *Function,
// A member function template is never instantiated to perform the copy
// of a class object to an object of its class type.
QualType ClassType = Context.getTypeDeclType(Constructor->getParent());
- if (Args.size() == 1 &&
- Constructor->isSpecializationCopyingObject() &&
+ if (Args.size() == 1 && Constructor->isSpecializationCopyingObject() &&
(Context.hasSameUnqualifiedType(ClassType, Args[0]->getType()) ||
- IsDerivedFrom(Args[0]->getType(), ClassType))) {
+ IsDerivedFrom(Args[0]->getLocStart(), Args[0]->getType(),
+ ClassType))) {
Candidate.Viable = false;
Candidate.FailureKind = ovl_fail_illegal_constructor;
return;
@@ -5761,7 +5839,7 @@ ObjCMethodDecl *Sema::SelectBestMethod(Selector Sel, MultiExprArg Args,
Match = false;
break;
}
-
+
ImplicitConversionSequence ConversionState
= TryCopyInitialization(*this, argExpr, param->getType(),
/*SuppressUserConversions*/false,
@@ -5809,27 +5887,36 @@ ObjCMethodDecl *Sema::SelectBestMethod(Selector Sel, MultiExprArg Args,
return nullptr;
}
-static bool IsNotEnableIfAttr(Attr *A) { return !isa<EnableIfAttr>(A); }
+// specific_attr_iterator iterates over enable_if attributes in reverse, and
+// enable_if is order-sensitive. As a result, we need to reverse things
+// sometimes. Size of 4 elements is arbitrary.
+static SmallVector<EnableIfAttr *, 4>
+getOrderedEnableIfAttrs(const FunctionDecl *Function) {
+ SmallVector<EnableIfAttr *, 4> Result;
+ if (!Function->hasAttrs())
+ return Result;
+
+ const auto &FuncAttrs = Function->getAttrs();
+ for (Attr *Attr : FuncAttrs)
+ if (auto *EnableIf = dyn_cast<EnableIfAttr>(Attr))
+ Result.push_back(EnableIf);
+
+ std::reverse(Result.begin(), Result.end());
+ return Result;
+}
EnableIfAttr *Sema::CheckEnableIf(FunctionDecl *Function, ArrayRef<Expr *> Args,
bool MissingImplicitThis) {
- // FIXME: specific_attr_iterator<EnableIfAttr> iterates in reverse order, but
- // we need to find the first failing one.
- if (!Function->hasAttrs())
- return nullptr;
- AttrVec Attrs = Function->getAttrs();
- AttrVec::iterator E = std::remove_if(Attrs.begin(), Attrs.end(),
- IsNotEnableIfAttr);
- if (Attrs.begin() == E)
+ auto EnableIfAttrs = getOrderedEnableIfAttrs(Function);
+ if (EnableIfAttrs.empty())
return nullptr;
- std::reverse(Attrs.begin(), E);
SFINAETrap Trap(*this);
-
- // Convert the arguments.
SmallVector<Expr *, 16> ConvertedArgs;
bool InitializationFailed = false;
bool ContainsValueDependentExpr = false;
+
+ // Convert the arguments.
for (unsigned i = 0, e = Args.size(); i != e; ++i) {
if (i == 0 && !MissingImplicitThis && isa<CXXMethodDecl>(Function) &&
!cast<CXXMethodDecl>(Function)->isStatic() &&
@@ -5861,11 +5948,32 @@ EnableIfAttr *Sema::CheckEnableIf(FunctionDecl *Function, ArrayRef<Expr *> Args,
}
if (InitializationFailed || Trap.hasErrorOccurred())
- return cast<EnableIfAttr>(Attrs[0]);
+ return EnableIfAttrs[0];
+
+ // Push default arguments if needed.
+ if (!Function->isVariadic() && Args.size() < Function->getNumParams()) {
+ for (unsigned i = Args.size(), e = Function->getNumParams(); i != e; ++i) {
+ ParmVarDecl *P = Function->getParamDecl(i);
+ ExprResult R = PerformCopyInitialization(
+ InitializedEntity::InitializeParameter(Context,
+ Function->getParamDecl(i)),
+ SourceLocation(),
+ P->hasUninstantiatedDefaultArg() ? P->getUninstantiatedDefaultArg()
+ : P->getDefaultArg());
+ if (R.isInvalid()) {
+ InitializationFailed = true;
+ break;
+ }
+ ContainsValueDependentExpr |= R.get()->isValueDependent();
+ ConvertedArgs.push_back(R.get());
+ }
+
+ if (InitializationFailed || Trap.hasErrorOccurred())
+ return EnableIfAttrs[0];
+ }
- for (AttrVec::iterator I = Attrs.begin(); I != E; ++I) {
+ for (auto *EIA : EnableIfAttrs) {
APValue Result;
- EnableIfAttr *EIA = cast<EnableIfAttr>(*I);
if (EIA->getCond()->isValueDependent()) {
// Don't even try now, we'll examine it after instantiation.
continue;
@@ -6027,9 +6135,9 @@ Sema::AddMethodCandidate(CXXMethodDecl *Method, DeclAccessPair FoundDecl,
else {
// Determine the implicit conversion sequence for the object
// parameter.
- Candidate.Conversions[0]
- = TryObjectArgumentInitialization(*this, ObjectType, ObjectClassification,
- Method, ActingContext);
+ Candidate.Conversions[0] = TryObjectArgumentInitialization(
+ *this, CandidateSet.getLocation(), ObjectType, ObjectClassification,
+ Method, ActingContext);
if (Candidate.Conversions[0].isBad()) {
Candidate.Viable = false;
Candidate.FailureKind = ovl_fail_bad_conversion;
@@ -6286,10 +6394,9 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
CXXRecordDecl *ConversionContext
= cast<CXXRecordDecl>(ImplicitParamType->getAs<RecordType>()->getDecl());
- Candidate.Conversions[0]
- = TryObjectArgumentInitialization(*this, From->getType(),
- From->Classify(Context),
- Conversion, ConversionContext);
+ Candidate.Conversions[0] = TryObjectArgumentInitialization(
+ *this, CandidateSet.getLocation(), From->getType(),
+ From->Classify(Context), Conversion, ConversionContext);
if (Candidate.Conversions[0].isBad()) {
Candidate.Viable = false;
@@ -6303,7 +6410,8 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
QualType FromCanon
= Context.getCanonicalType(From->getType().getUnqualifiedType());
QualType ToCanon = Context.getCanonicalType(ToType).getUnqualifiedType();
- if (FromCanon == ToCanon || IsDerivedFrom(FromCanon, ToCanon)) {
+ if (FromCanon == ToCanon ||
+ IsDerivedFrom(CandidateSet.getLocation(), FromCanon, ToCanon)) {
Candidate.Viable = false;
Candidate.FailureKind = ovl_fail_trivial_conversion;
return;
@@ -6325,7 +6433,7 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
&ConversionRef, VK_RValue);
QualType ConversionType = Conversion->getConversionType();
- if (RequireCompleteType(From->getLocStart(), ConversionType, 0)) {
+ if (!isCompleteType(From->getLocStart(), ConversionType)) {
Candidate.Viable = false;
Candidate.FailureKind = ovl_fail_bad_final_conversion;
return;
@@ -6463,10 +6571,9 @@ void Sema::AddSurrogateCandidate(CXXConversionDecl *Conversion,
// Determine the implicit conversion sequence for the implicit
// object parameter.
- ImplicitConversionSequence ObjectInit
- = TryObjectArgumentInitialization(*this, Object->getType(),
- Object->Classify(Context),
- Conversion, ActingContext);
+ ImplicitConversionSequence ObjectInit = TryObjectArgumentInitialization(
+ *this, CandidateSet.getLocation(), Object->getType(),
+ Object->Classify(Context), Conversion, ActingContext);
if (ObjectInit.isBad()) {
Candidate.Viable = false;
Candidate.FailureKind = ovl_fail_bad_conversion;
@@ -6575,7 +6682,8 @@ void Sema::AddMemberOperatorCandidates(OverloadedOperatorKind Op,
// the set of member candidates is empty.
if (const RecordType *T1Rec = T1->getAs<RecordType>()) {
// Complete the type if it can be completed.
- RequireCompleteType(OpLoc, T1, 0);
+ if (!isCompleteType(OpLoc, T1) && !T1Rec->isBeingDefined())
+ return;
// If the type is neither complete nor being defined, bail out now.
if (!T1Rec->getDecl()->getDefinition())
return;
@@ -6924,7 +7032,7 @@ BuiltinCandidateTypeSet::AddTypesConvertedFrom(QualType Ty,
HasNullPtrType = true;
} else if (AllowUserConversions && TyRec) {
// No conversion functions in incomplete types.
- if (SemaRef.RequireCompleteType(Loc, Ty, 0))
+ if (!SemaRef.isCompleteType(Loc, Ty))
return;
CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(TyRec->getDecl());
@@ -7527,7 +7635,7 @@ public:
llvm::SmallPtrSet<QualType, 8> AddedTypes;
for (int Arg = 0; Arg < 2; ++Arg) {
- QualType AsymetricParamTypes[2] = {
+ QualType AsymmetricParamTypes[2] = {
S.Context.getPointerDiffType(),
S.Context.getPointerDiffType(),
};
@@ -7539,11 +7647,11 @@ public:
if (!PointeeTy->isObjectType())
continue;
- AsymetricParamTypes[Arg] = *Ptr;
+ AsymmetricParamTypes[Arg] = *Ptr;
if (Arg == 0 || Op == OO_Plus) {
// operator+(T*, ptrdiff_t) or operator-(T*, ptrdiff_t)
// T* operator+(ptrdiff_t, T*);
- S.AddBuiltinCandidate(*Ptr, AsymetricParamTypes, Args, CandidateSet);
+ S.AddBuiltinCandidate(*Ptr, AsymmetricParamTypes, Args, CandidateSet);
}
if (Op == OO_Minus) {
// ptrdiff_t operator-(T, T);
@@ -8013,7 +8121,7 @@ public:
const MemberPointerType *mptr = cast<MemberPointerType>(*MemPtr);
QualType C2 = QualType(mptr->getClass(), 0);
C2 = C2.getUnqualifiedType();
- if (C1 != C2 && !S.IsDerivedFrom(C1, C2))
+ if (C1 != C2 && !S.IsDerivedFrom(CandidateSet.getLocation(), C1, C2))
break;
QualType ParamTypes[2] = { *Ptr, *MemPtr };
// build CV12 T&
@@ -8157,9 +8265,11 @@ void Sema::AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
case OO_Comma:
case OO_Arrow:
+ case OO_Coawait:
// C++ [over.match.oper]p3:
- // -- For the operator ',', the unary operator '&', or the
- // operator '->', the built-in candidates set is empty.
+ // -- For the operator ',', the unary operator '&', the
+ // operator '->', or the operator 'co_await', the
+ // built-in candidates set is empty.
break;
case OO_Plus: // '+' is either unary or binary
@@ -8328,6 +8438,44 @@ Sema::AddArgumentDependentLookupCandidates(DeclarationName Name,
}
}
+// Determines whether Cand1 is "better" in terms of its enable_if attrs than
+// Cand2 for overloading. This function assumes that all of the enable_if attrs
+// on Cand1 and Cand2 have conditions that evaluate to true.
+//
+// Cand1's set of enable_if attributes are said to be "better" than Cand2's iff
+// Cand1's first N enable_if attributes have precisely the same conditions as
+// Cand2's first N enable_if attributes (where N = the number of enable_if
+// attributes on Cand2), and Cand1 has more than N enable_if attributes.
+static bool hasBetterEnableIfAttrs(Sema &S, const FunctionDecl *Cand1,
+ const FunctionDecl *Cand2) {
+
+ // FIXME: The next several lines are just
+ // specific_attr_iterator<EnableIfAttr> but going in declaration order,
+ // instead of reverse order which is how they're stored in the AST.
+ auto Cand1Attrs = getOrderedEnableIfAttrs(Cand1);
+ auto Cand2Attrs = getOrderedEnableIfAttrs(Cand2);
+
+ // Candidate 1 is better if it has strictly more attributes and
+ // the common sequence is identical.
+ if (Cand1Attrs.size() <= Cand2Attrs.size())
+ return false;
+
+ auto Cand1I = Cand1Attrs.begin();
+ llvm::FoldingSetNodeID Cand1ID, Cand2ID;
+ for (auto &Cand2A : Cand2Attrs) {
+ Cand1ID.clear();
+ Cand2ID.clear();
+
+ auto &Cand1A = *Cand1I++;
+ Cand1A->getCond()->Profile(Cand1ID, S.getASTContext(), true);
+ Cand2A->getCond()->Profile(Cand2ID, S.getASTContext(), true);
+ if (Cand1ID != Cand2ID)
+ return false;
+ }
+
+ return true;
+}
+
/// isBetterOverloadCandidate - Determines whether the first overload
/// candidate is a better candidate than the second (C++ 13.3.3p1).
bool clang::isBetterOverloadCandidate(Sema &S, const OverloadCandidate &Cand1,
@@ -8359,7 +8507,7 @@ bool clang::isBetterOverloadCandidate(Sema &S, const OverloadCandidate &Cand1,
assert(Cand2.NumConversions == NumArgs && "Overload candidate mismatch");
bool HasBetterConversion = false;
for (unsigned ArgIdx = StartArg; ArgIdx < NumArgs; ++ArgIdx) {
- switch (CompareImplicitConversionSequences(S,
+ switch (CompareImplicitConversionSequences(S, Loc,
Cand1.Conversions[ArgIdx],
Cand2.Conversions[ArgIdx])) {
case ImplicitConversionSequence::Better:
@@ -8398,7 +8546,7 @@ bool clang::isBetterOverloadCandidate(Sema &S, const OverloadCandidate &Cand1,
ImplicitConversionSequence::CompareKind Result =
compareConversionFunctions(S, Cand1.Function, Cand2.Function);
if (Result == ImplicitConversionSequence::Indistinguishable)
- Result = CompareStandardConversionSequences(S,
+ Result = CompareStandardConversionSequences(S, Loc,
Cand1.FinalConversion,
Cand2.FinalConversion);
@@ -8438,51 +8586,90 @@ bool clang::isBetterOverloadCandidate(Sema &S, const OverloadCandidate &Cand1,
// Check for enable_if value-based overload resolution.
if (Cand1.Function && Cand2.Function &&
(Cand1.Function->hasAttr<EnableIfAttr>() ||
- Cand2.Function->hasAttr<EnableIfAttr>())) {
- // FIXME: The next several lines are just
- // specific_attr_iterator<EnableIfAttr> but going in declaration order,
- // instead of reverse order which is how they're stored in the AST.
- AttrVec Cand1Attrs;
- if (Cand1.Function->hasAttrs()) {
- Cand1Attrs = Cand1.Function->getAttrs();
- Cand1Attrs.erase(std::remove_if(Cand1Attrs.begin(), Cand1Attrs.end(),
- IsNotEnableIfAttr),
- Cand1Attrs.end());
- std::reverse(Cand1Attrs.begin(), Cand1Attrs.end());
- }
-
- AttrVec Cand2Attrs;
- if (Cand2.Function->hasAttrs()) {
- Cand2Attrs = Cand2.Function->getAttrs();
- Cand2Attrs.erase(std::remove_if(Cand2Attrs.begin(), Cand2Attrs.end(),
- IsNotEnableIfAttr),
- Cand2Attrs.end());
- std::reverse(Cand2Attrs.begin(), Cand2Attrs.end());
- }
-
- // Candidate 1 is better if it has strictly more attributes and
- // the common sequence is identical.
- if (Cand1Attrs.size() <= Cand2Attrs.size())
- return false;
+ Cand2.Function->hasAttr<EnableIfAttr>()))
+ return hasBetterEnableIfAttrs(S, Cand1.Function, Cand2.Function);
+
+ if (S.getLangOpts().CUDA && S.getLangOpts().CUDATargetOverloads &&
+ Cand1.Function && Cand2.Function) {
+ FunctionDecl *Caller = dyn_cast<FunctionDecl>(S.CurContext);
+ return S.IdentifyCUDAPreference(Caller, Cand1.Function) >
+ S.IdentifyCUDAPreference(Caller, Cand2.Function);
+ }
+
+ bool HasPS1 = Cand1.Function != nullptr &&
+ functionHasPassObjectSizeParams(Cand1.Function);
+ bool HasPS2 = Cand2.Function != nullptr &&
+ functionHasPassObjectSizeParams(Cand2.Function);
+ return HasPS1 != HasPS2 && HasPS1;
+}
+
+/// Determine whether two declarations are "equivalent" for the purposes of
+/// name lookup and overload resolution. This applies when the same internal/no
+/// linkage entity is defined by two modules (probably by textually including
+/// the same header). In such a case, we don't consider the declarations to
+/// declare the same entity, but we also don't want lookups with both
+/// declarations visible to be ambiguous in some cases (this happens when using
+/// a modularized libstdc++).
+bool Sema::isEquivalentInternalLinkageDeclaration(const NamedDecl *A,
+ const NamedDecl *B) {
+ auto *VA = dyn_cast_or_null<ValueDecl>(A);
+ auto *VB = dyn_cast_or_null<ValueDecl>(B);
+ if (!VA || !VB)
+ return false;
- auto Cand1I = Cand1Attrs.begin();
- for (auto &Cand2A : Cand2Attrs) {
- auto &Cand1A = *Cand1I++;
- llvm::FoldingSetNodeID Cand1ID, Cand2ID;
- cast<EnableIfAttr>(Cand1A)->getCond()->Profile(Cand1ID,
- S.getASTContext(), true);
- cast<EnableIfAttr>(Cand2A)->getCond()->Profile(Cand2ID,
- S.getASTContext(), true);
- if (Cand1ID != Cand2ID)
- return false;
- }
+ // The declarations must be declaring the same name as an internal linkage
+ // entity in different modules.
+ if (!VA->getDeclContext()->getRedeclContext()->Equals(
+ VB->getDeclContext()->getRedeclContext()) ||
+ getOwningModule(const_cast<ValueDecl *>(VA)) ==
+ getOwningModule(const_cast<ValueDecl *>(VB)) ||
+ VA->isExternallyVisible() || VB->isExternallyVisible())
+ return false;
+ // Check that the declarations appear to be equivalent.
+ //
+ // FIXME: Checking the type isn't really enough to resolve the ambiguity.
+ // For constants and functions, we should check the initializer or body is
+ // the same. For non-constant variables, we shouldn't allow it at all.
+ if (Context.hasSameType(VA->getType(), VB->getType()))
return true;
+
+ // Enum constants within unnamed enumerations will have different types, but
+ // may still be similar enough to be interchangeable for our purposes.
+ if (auto *EA = dyn_cast<EnumConstantDecl>(VA)) {
+ if (auto *EB = dyn_cast<EnumConstantDecl>(VB)) {
+ // Only handle anonymous enums. If the enumerations were named and
+ // equivalent, they would have been merged to the same type.
+ auto *EnumA = cast<EnumDecl>(EA->getDeclContext());
+ auto *EnumB = cast<EnumDecl>(EB->getDeclContext());
+ if (EnumA->hasNameForLinkage() || EnumB->hasNameForLinkage() ||
+ !Context.hasSameType(EnumA->getIntegerType(),
+ EnumB->getIntegerType()))
+ return false;
+ // Allow this only if the value is the same for both enumerators.
+ return llvm::APSInt::isSameValue(EA->getInitVal(), EB->getInitVal());
+ }
}
+ // Nothing else is sufficiently similar.
return false;
}
+void Sema::diagnoseEquivalentInternalLinkageDeclarations(
+ SourceLocation Loc, const NamedDecl *D, ArrayRef<const NamedDecl *> Equiv) {
+ Diag(Loc, diag::ext_equivalent_internal_linkage_decl_in_modules) << D;
+
+ Module *M = getOwningModule(const_cast<NamedDecl*>(D));
+ Diag(D->getLocation(), diag::note_equivalent_internal_linkage_decl)
+ << !M << (M ? M->getFullModuleName() : "");
+
+ for (auto *E : Equiv) {
+ Module *M = getOwningModule(const_cast<NamedDecl*>(E));
+ Diag(E->getLocation(), diag::note_equivalent_internal_linkage_decl)
+ << !M << (M ? M->getFullModuleName() : "");
+ }
+}
+
/// \brief Computes the best viable function (C++ 13.3.3)
/// within an overload candidate set.
///
@@ -8510,6 +8697,8 @@ OverloadCandidateSet::BestViableFunction(Sema &S, SourceLocation Loc,
if (Best == end())
return OR_No_Viable_Function;
+ llvm::SmallVector<const NamedDecl *, 4> EquivalentCands;
+
// Make sure that this function is better than every other viable
// function. If not, we have an ambiguity.
for (iterator Cand = begin(); Cand != end(); ++Cand) {
@@ -8517,6 +8706,12 @@ OverloadCandidateSet::BestViableFunction(Sema &S, SourceLocation Loc,
Cand != Best &&
!isBetterOverloadCandidate(S, *Best, *Cand, Loc,
UserDefinedConversion)) {
+ if (S.isEquivalentInternalLinkageDeclaration(Best->Function,
+ Cand->Function)) {
+ EquivalentCands.push_back(Cand->Function);
+ continue;
+ }
+
Best = end();
return OR_Ambiguous;
}
@@ -8528,6 +8723,10 @@ OverloadCandidateSet::BestViableFunction(Sema &S, SourceLocation Loc,
S.isFunctionConsideredUnavailable(Best->Function)))
return OR_Deleted;
+ if (!EquivalentCands.empty())
+ S.diagnoseEquivalentInternalLinkageDeclarations(Loc, Best->Function,
+ EquivalentCands);
+
return OR_Success;
}
@@ -8608,12 +8807,85 @@ void MaybeEmitInheritedConstructorNote(Sema &S, Decl *Fn) {
} // end anonymous namespace
+static bool isFunctionAlwaysEnabled(const ASTContext &Ctx,
+ const FunctionDecl *FD) {
+ for (auto *EnableIf : FD->specific_attrs<EnableIfAttr>()) {
+ bool AlwaysTrue;
+ if (!EnableIf->getCond()->EvaluateAsBooleanCondition(AlwaysTrue, Ctx))
+ return false;
+ if (!AlwaysTrue)
+ return false;
+ }
+ return true;
+}
+
+/// \brief Returns true if we can take the address of the function.
+///
+/// \param Complain - If true, we'll emit a diagnostic
+/// \param InOverloadResolution - For the purposes of emitting a diagnostic, are
+/// we in overload resolution?
+/// \param Loc - The location of the statement we're complaining about. Ignored
+/// if we're not complaining, or if we're in overload resolution.
+static bool checkAddressOfFunctionIsAvailable(Sema &S, const FunctionDecl *FD,
+ bool Complain,
+ bool InOverloadResolution,
+ SourceLocation Loc) {
+ if (!isFunctionAlwaysEnabled(S.Context, FD)) {
+ if (Complain) {
+ if (InOverloadResolution)
+ S.Diag(FD->getLocStart(),
+ diag::note_addrof_ovl_candidate_disabled_by_enable_if_attr);
+ else
+ S.Diag(Loc, diag::err_addrof_function_disabled_by_enable_if_attr) << FD;
+ }
+ return false;
+ }
+
+ auto I = std::find_if(FD->param_begin(), FD->param_end(),
+ std::mem_fn(&ParmVarDecl::hasAttr<PassObjectSizeAttr>));
+ if (I == FD->param_end())
+ return true;
+
+ if (Complain) {
+ // Add one to ParamNo because it's user-facing
+ unsigned ParamNo = std::distance(FD->param_begin(), I) + 1;
+ if (InOverloadResolution)
+ S.Diag(FD->getLocation(),
+ diag::note_ovl_candidate_has_pass_object_size_params)
+ << ParamNo;
+ else
+ S.Diag(Loc, diag::err_address_of_function_with_pass_object_size_params)
+ << FD << ParamNo;
+ }
+ return false;
+}
+
+static bool checkAddressOfCandidateIsAvailable(Sema &S,
+ const FunctionDecl *FD) {
+ return checkAddressOfFunctionIsAvailable(S, FD, /*Complain=*/true,
+ /*InOverloadResolution=*/true,
+ /*Loc=*/SourceLocation());
+}
+
+bool Sema::checkAddressOfFunctionIsAvailable(const FunctionDecl *Function,
+ bool Complain,
+ SourceLocation Loc) {
+ return ::checkAddressOfFunctionIsAvailable(*this, Function, Complain,
+ /*InOverloadResolution=*/false,
+ Loc);
+}
+
// Notes the location of an overload candidate.
-void Sema::NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType) {
+void Sema::NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType,
+ bool TakingAddress) {
+ if (TakingAddress && !checkAddressOfCandidateIsAvailable(*this, Fn))
+ return;
+
std::string FnDesc;
OverloadCandidateKind K = ClassifyOverloadCandidate(*this, Fn, FnDesc);
PartialDiagnostic PD = PDiag(diag::note_ovl_candidate)
<< (unsigned) K << FnDesc;
+
HandleFunctionTypeMismatch(PD, Fn->getType(), DestType);
Diag(Fn->getLocation(), PD);
MaybeEmitInheritedConstructorNote(*this, Fn);
@@ -8621,7 +8893,8 @@ void Sema::NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType) {
// Notes the location of all overload candidates designated through
// OverloadedExpr
-void Sema::NoteAllOverloadCandidates(Expr* OverloadedExpr, QualType DestType) {
+void Sema::NoteAllOverloadCandidates(Expr *OverloadedExpr, QualType DestType,
+ bool TakingAddress) {
assert(OverloadedExpr->getType() == Context.OverloadTy);
OverloadExpr::FindResult Ovl = OverloadExpr::find(OverloadedExpr);
@@ -8632,10 +8905,11 @@ void Sema::NoteAllOverloadCandidates(Expr* OverloadedExpr, QualType DestType) {
I != IEnd; ++I) {
if (FunctionTemplateDecl *FunTmpl =
dyn_cast<FunctionTemplateDecl>((*I)->getUnderlyingDecl()) ) {
- NoteOverloadCandidate(FunTmpl->getTemplatedDecl(), DestType);
+ NoteOverloadCandidate(FunTmpl->getTemplatedDecl(), DestType,
+ TakingAddress);
} else if (FunctionDecl *Fun
= dyn_cast<FunctionDecl>((*I)->getUnderlyingDecl()) ) {
- NoteOverloadCandidate(Fun, DestType);
+ NoteOverloadCandidate(Fun, DestType, TakingAddress);
}
}
}
@@ -8666,7 +8940,7 @@ void ImplicitConversionSequence::DiagnoseAmbiguousConversion(
}
static void DiagnoseBadConversion(Sema &S, OverloadCandidate *Cand,
- unsigned I) {
+ unsigned I, bool TakingCandidateAddress) {
const ImplicitConversionSequence &Conv = Cand->Conversions[I];
assert(Conv.isBad());
assert(Cand->Function && "for now, candidate must be a function");
@@ -8808,7 +9082,7 @@ static void DiagnoseBadConversion(Sema &S, OverloadCandidate *Cand,
FromPtrTy->getPointeeType()) &&
!FromPtrTy->getPointeeType()->isIncompleteType() &&
!ToPtrTy->getPointeeType()->isIncompleteType() &&
- S.IsDerivedFrom(ToPtrTy->getPointeeType(),
+ S.IsDerivedFrom(SourceLocation(), ToPtrTy->getPointeeType(),
FromPtrTy->getPointeeType()))
BaseToDerivedConversion = 1;
}
@@ -8826,7 +9100,7 @@ static void DiagnoseBadConversion(Sema &S, OverloadCandidate *Cand,
if (ToRefTy->getPointeeType().isAtLeastAsQualifiedAs(FromTy) &&
!FromTy->isIncompleteType() &&
!ToRefTy->getPointeeType()->isIncompleteType() &&
- S.IsDerivedFrom(ToRefTy->getPointeeType(), FromTy)) {
+ S.IsDerivedFrom(SourceLocation(), ToRefTy->getPointeeType(), FromTy)) {
BaseToDerivedConversion = 3;
} else if (ToTy->isLValueReferenceType() && !FromExpr->isLValue() &&
ToTy.getNonReferenceType().getCanonicalType() ==
@@ -8864,7 +9138,11 @@ static void DiagnoseBadConversion(Sema &S, OverloadCandidate *Cand,
return;
}
}
-
+
+ if (TakingCandidateAddress &&
+ !checkAddressOfCandidateIsAvailable(S, Cand->Function))
+ return;
+
// Emit the generic diagnostic and, optionally, add the hints to it.
PartialDiagnostic FDiag = S.PDiag(diag::note_ovl_candidate_bad_conv);
FDiag << (unsigned) FnKind << FnDesc
@@ -8975,7 +9253,8 @@ static TemplateDecl *getDescribedTemplate(Decl *Templated) {
/// Diagnose a failed template-argument deduction.
static void DiagnoseBadDeduction(Sema &S, Decl *Templated,
DeductionFailureInfo &DeductionFailure,
- unsigned NumArgs) {
+ unsigned NumArgs,
+ bool TakingCandidateAddress) {
TemplateParameter Param = DeductionFailure.getTemplateParameter();
NamedDecl *ParamD;
(ParamD = Param.dyn_cast<TemplateTypeParmDecl*>()) ||
@@ -9143,6 +9422,11 @@ static void DiagnoseBadDeduction(Sema &S, Decl *Templated,
}
}
}
+
+ if (TakingCandidateAddress && isa<FunctionDecl>(Templated) &&
+ !checkAddressOfCandidateIsAvailable(S, cast<FunctionDecl>(Templated)))
+ return;
+
// FIXME: For generic lambda parameters, check if the function is a lambda
// call operator, and if so, emit a prettier and more informative
// diagnostic that mentions 'auto' and lambda in addition to
@@ -9163,14 +9447,15 @@ static void DiagnoseBadDeduction(Sema &S, Decl *Templated,
/// Diagnose a failed template-argument deduction, for function calls.
static void DiagnoseBadDeduction(Sema &S, OverloadCandidate *Cand,
- unsigned NumArgs) {
+ unsigned NumArgs,
+ bool TakingCandidateAddress) {
unsigned TDK = Cand->DeductionFailure.Result;
if (TDK == Sema::TDK_TooFewArguments || TDK == Sema::TDK_TooManyArguments) {
if (CheckArityMismatch(S, Cand, NumArgs))
return;
}
DiagnoseBadDeduction(S, Cand->Function, // pattern
- Cand->DeductionFailure, NumArgs);
+ Cand->DeductionFailure, NumArgs, TakingCandidateAddress);
}
/// CUDA: diagnose an invalid call across targets.
@@ -9251,7 +9536,8 @@ static void DiagnoseFailedEnableIfAttr(Sema &S, OverloadCandidate *Cand) {
/// more richly for those diagnostic clients that cared, but we'd
/// still have to be just as careful with the default diagnostics.
static void NoteFunctionCandidate(Sema &S, OverloadCandidate *Cand,
- unsigned NumArgs) {
+ unsigned NumArgs,
+ bool TakingCandidateAddress) {
FunctionDecl *Fn = Cand->Function;
// Note deleted candidates, but only if they're viable.
@@ -9279,7 +9565,7 @@ static void NoteFunctionCandidate(Sema &S, OverloadCandidate *Cand,
return DiagnoseArityMismatch(S, Cand, NumArgs);
case ovl_fail_bad_deduction:
- return DiagnoseBadDeduction(S, Cand, NumArgs);
+ return DiagnoseBadDeduction(S, Cand, NumArgs, TakingCandidateAddress);
case ovl_fail_illegal_constructor: {
S.Diag(Fn->getLocation(), diag::note_ovl_candidate_illegal_constructor)
@@ -9297,7 +9583,7 @@ static void NoteFunctionCandidate(Sema &S, OverloadCandidate *Cand,
unsigned I = (Cand->IgnoreObjectArgument ? 1 : 0);
for (unsigned N = Cand->NumConversions; I != N; ++I)
if (Cand->Conversions[I].isBad())
- return DiagnoseBadConversion(S, Cand, I);
+ return DiagnoseBadConversion(S, Cand, I, TakingCandidateAddress);
// FIXME: this currently happens when we're called from SemaInit
// when user-conversion overload fails. Figure out how to handle
@@ -9421,9 +9707,10 @@ static unsigned RankDeductionFailure(const DeductionFailureInfo &DFI) {
namespace {
struct CompareOverloadCandidatesForDisplay {
Sema &S;
+ SourceLocation Loc;
size_t NumArgs;
- CompareOverloadCandidatesForDisplay(Sema &S, size_t nArgs)
+ CompareOverloadCandidatesForDisplay(Sema &S, SourceLocation Loc, size_t nArgs)
: S(S), NumArgs(nArgs) {}
bool operator()(const OverloadCandidate *L,
@@ -9494,7 +9781,7 @@ struct CompareOverloadCandidatesForDisplay {
int leftBetter = 0;
unsigned I = (L->IgnoreObjectArgument || R->IgnoreObjectArgument);
for (unsigned E = L->NumConversions; I != E; ++I) {
- switch (CompareImplicitConversionSequences(S,
+ switch (CompareImplicitConversionSequences(S, Loc,
L->Conversions[I],
R->Conversions[I])) {
case ImplicitConversionSequence::Better:
@@ -9649,7 +9936,7 @@ void OverloadCandidateSet::NoteCandidates(Sema &S,
}
std::sort(Cands.begin(), Cands.end(),
- CompareOverloadCandidatesForDisplay(S, Args.size()));
+ CompareOverloadCandidatesForDisplay(S, OpLoc, Args.size()));
bool ReportedAmbiguousConversions = false;
@@ -9668,7 +9955,8 @@ void OverloadCandidateSet::NoteCandidates(Sema &S,
++CandsShown;
if (Cand->Function)
- NoteFunctionCandidate(S, Cand, Args.size());
+ NoteFunctionCandidate(S, Cand, Args.size(),
+ /*TakingCandidateAddress=*/false);
else if (Cand->IsSurrogate)
NoteSurrogateCandidate(S, Cand);
else {
@@ -9736,9 +10024,10 @@ struct CompareTemplateSpecCandidatesForDisplay {
/// Diagnose a template argument deduction failure.
/// We are treating these failures as overload failures due to bad
/// deductions.
-void TemplateSpecCandidate::NoteDeductionFailure(Sema &S) {
+void TemplateSpecCandidate::NoteDeductionFailure(Sema &S,
+ bool ForTakingAddress) {
DiagnoseBadDeduction(S, Specialization, // pattern
- DeductionFailure, /*NumArgs=*/0);
+ DeductionFailure, /*NumArgs=*/0, ForTakingAddress);
}
void TemplateSpecCandidateSet::destroyCandidates() {
@@ -9791,7 +10080,7 @@ void TemplateSpecCandidateSet::NoteCandidates(Sema &S, SourceLocation Loc) {
assert(Cand->Specialization &&
"Non-matching built-in candidates are not added to Cands.");
- Cand->NoteDeductionFailure(S);
+ Cand->NoteDeductionFailure(S, ForTakingAddress);
}
if (I != E)
@@ -9836,6 +10125,7 @@ class AddressOfFunctionResolver {
bool TargetTypeIsNonStaticMemberFunction;
bool FoundNonTemplateFunction;
bool StaticMemberFunctionFromBoundPointer;
+ bool HasComplained;
OverloadExpr::FindResult OvlExprInfo;
OverloadExpr *OvlExpr;
@@ -9852,9 +10142,10 @@ public:
!!TargetType->getAs<MemberPointerType>()),
FoundNonTemplateFunction(false),
StaticMemberFunctionFromBoundPointer(false),
+ HasComplained(false),
OvlExprInfo(OverloadExpr::find(SourceExpr)),
OvlExpr(OvlExprInfo.Expression),
- FailedCandidates(OvlExpr->getNameLoc()) {
+ FailedCandidates(OvlExpr->getNameLoc(), /*ForTakingAddress=*/true) {
ExtractUnqualifiedFunctionTypeFromTargetType();
if (TargetFunctionType->isFunctionType()) {
@@ -9885,21 +10176,57 @@ public:
}
if (OvlExpr->hasExplicitTemplateArgs())
- OvlExpr->getExplicitTemplateArgs().copyInto(OvlExplicitTemplateArgs);
+ OvlExpr->copyTemplateArgumentsInto(OvlExplicitTemplateArgs);
if (FindAllFunctionsThatMatchTargetTypeExactly()) {
// C++ [over.over]p4:
// If more than one function is selected, [...]
- if (Matches.size() > 1) {
+ if (Matches.size() > 1 && !eliminiateSuboptimalOverloadCandidates()) {
if (FoundNonTemplateFunction)
EliminateAllTemplateMatches();
else
EliminateAllExceptMostSpecializedTemplate();
}
}
+
+ if (S.getLangOpts().CUDA && S.getLangOpts().CUDATargetOverloads &&
+ Matches.size() > 1)
+ EliminateSuboptimalCudaMatches();
}
-
+
+ bool hasComplained() const { return HasComplained; }
+
private:
+ // Is A considered a better overload candidate for the desired type than B?
+ bool isBetterCandidate(const FunctionDecl *A, const FunctionDecl *B) {
+ return hasBetterEnableIfAttrs(S, A, B);
+ }
+
+ // Returns true if we've eliminated any (read: all but one) candidates, false
+ // otherwise.
+ bool eliminiateSuboptimalOverloadCandidates() {
+ // Same algorithm as overload resolution -- one pass to pick the "best",
+ // another pass to be sure that nothing is better than the best.
+ auto Best = Matches.begin();
+ for (auto I = Matches.begin()+1, E = Matches.end(); I != E; ++I)
+ if (isBetterCandidate(I->second, Best->second))
+ Best = I;
+
+ const FunctionDecl *BestFn = Best->second;
+ auto IsBestOrInferiorToBest = [this, BestFn](
+ const std::pair<DeclAccessPair, FunctionDecl *> &Pair) {
+ return BestFn == Pair.second || isBetterCandidate(BestFn, Pair.second);
+ };
+
+ // Note: We explicitly leave Matches unmodified if there isn't a clear best
+ // option, so we can potentially give the user a better error
+ if (!std::all_of(Matches.begin(), Matches.end(), IsBestOrInferiorToBest))
+ return false;
+ Matches[0] = *Best;
+ Matches.resize(1);
+ return true;
+ }
+
bool isTargetTypeAFunction() const {
return TargetFunctionType->isFunctionType();
}
@@ -9953,6 +10280,10 @@ private:
assert(S.isSameOrCompatibleFunctionType(
Context.getCanonicalType(Specialization->getType()),
Context.getCanonicalType(TargetFunctionType)));
+
+ if (!S.checkAddressOfFunctionIsAvailable(Specialization))
+ return false;
+
Matches.push_back(std::make_pair(CurAccessFunPair, Specialization));
return true;
}
@@ -9978,16 +10309,22 @@ private:
// now.
if (S.getLangOpts().CPlusPlus14 &&
FunDecl->getReturnType()->isUndeducedType() &&
- S.DeduceReturnType(FunDecl, SourceExpr->getLocStart(), Complain))
+ S.DeduceReturnType(FunDecl, SourceExpr->getLocStart(), Complain)) {
+ HasComplained |= Complain;
+ return false;
+ }
+
+ if (!S.checkAddressOfFunctionIsAvailable(FunDecl))
return false;
QualType ResultTy;
if (Context.hasSameUnqualifiedType(TargetFunctionType,
FunDecl->getType()) ||
S.IsNoReturnConversion(FunDecl->getType(), TargetFunctionType,
- ResultTy)) {
- Matches.push_back(std::make_pair(CurAccessFunPair,
- cast<FunctionDecl>(FunDecl->getCanonicalDecl())));
+ ResultTy) ||
+ (!S.getLangOpts().CPlusPlus && TargetType->isVoidPointerType())) {
+ Matches.push_back(std::make_pair(
+ CurAccessFunPair, cast<FunctionDecl>(FunDecl->getCanonicalDecl())));
FoundNonTemplateFunction = true;
return true;
}
@@ -10061,7 +10398,8 @@ private:
Matches[0].first = Matches[Result - MatchesCopy.begin()].first;
Matches[0].second = cast<FunctionDecl>(*Result);
Matches.resize(1);
- }
+ } else
+ HasComplained |= Complain;
}
void EliminateAllTemplateMatches() {
@@ -10072,11 +10410,15 @@ private:
++I;
else {
Matches[I] = Matches[--N];
- Matches.set_size(N);
+ Matches.resize(N);
}
}
}
+ void EliminateSuboptimalCudaMatches() {
+ S.EraseUnwantedCUDAMatches(dyn_cast<FunctionDecl>(S.CurContext), Matches);
+ }
+
public:
void ComplainNoMatchesFound() const {
assert(Matches.empty());
@@ -10084,7 +10426,8 @@ public:
<< OvlExpr->getName() << TargetFunctionType
<< OvlExpr->getSourceRange();
if (FailedCandidates.empty())
- S.NoteAllOverloadCandidates(OvlExpr, TargetFunctionType);
+ S.NoteAllOverloadCandidates(OvlExpr, TargetFunctionType,
+ /*TakingAddress=*/true);
else {
// We have some deduction failure messages. Use them to diagnose
// the function templates, and diagnose the non-template candidates
@@ -10094,7 +10437,9 @@ public:
I != IEnd; ++I)
if (FunctionDecl *Fun =
dyn_cast<FunctionDecl>((*I)->getUnderlyingDecl()))
- S.NoteOverloadCandidate(Fun, TargetFunctionType);
+ if (!functionHasPassObjectSizeParams(Fun))
+ S.NoteOverloadCandidate(Fun, TargetFunctionType,
+ /*TakingAddress=*/true);
FailedCandidates.NoteCandidates(S, OvlExpr->getLocStart());
}
}
@@ -10132,7 +10477,8 @@ public:
S.Diag(OvlExpr->getLocStart(), diag::err_addr_ovl_ambiguous)
<< OvlExpr->getName()
<< OvlExpr->getSourceRange();
- S.NoteAllOverloadCandidates(OvlExpr, TargetFunctionType);
+ S.NoteAllOverloadCandidates(OvlExpr, TargetFunctionType,
+ /*TakingAddress=*/true);
}
bool hadMultipleCandidates() const { return (OvlExpr->getNumDecls() > 1); }
@@ -10178,13 +10524,14 @@ Sema::ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
Complain);
int NumMatches = Resolver.getNumMatches();
FunctionDecl *Fn = nullptr;
- if (NumMatches == 0 && Complain) {
+ bool ShouldComplain = Complain && !Resolver.hasComplained();
+ if (NumMatches == 0 && ShouldComplain) {
if (Resolver.IsInvalidFormOfPointerToMemberFunction())
Resolver.ComplainIsInvalidFormOfPointerToMemberFunction();
else
Resolver.ComplainNoMatchesFound();
}
- else if (NumMatches > 1 && Complain)
+ else if (NumMatches > 1 && ShouldComplain)
Resolver.ComplainMultipleMatchesFound();
else if (NumMatches == 1) {
Fn = Resolver.getMatchingFunctionDecl();
@@ -10229,7 +10576,7 @@ Sema::ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
return nullptr;
TemplateArgumentListInfo ExplicitTemplateArgs;
- ovl->getExplicitTemplateArgs().copyInto(ExplicitTemplateArgs);
+ ovl->copyTemplateArgumentsInto(ExplicitTemplateArgs);
TemplateSpecCandidateSet FailedCandidates(ovl->getNameLoc());
// Look through all of the overloaded functions, searching for one
@@ -10303,7 +10650,7 @@ Sema::ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
// returns true if 'complain' is set.
bool Sema::ResolveAndFixSingleFunctionTemplateSpecialization(
ExprResult &SrcExpr, bool doFunctionPointerConverion,
- bool complain, const SourceRange& OpRangeForComplaining,
+ bool complain, SourceRange OpRangeForComplaining,
QualType DestTypeForComplaining,
unsigned DiagIDForComplaining) {
assert(SrcExpr.get()->getType() == Context.OverloadTy);
@@ -10678,8 +11025,8 @@ BuildRecoveryCallExpr(Sema &SemaRef, Scope *S, Expr *Fn,
// casts and such from the call, we don't really care.
ExprResult NewFn = ExprError();
if ((*R.begin())->isCXXClassMember())
- NewFn = SemaRef.BuildPossibleImplicitMemberExpr(SS, TemplateKWLoc,
- R, ExplicitTemplateArgs);
+ NewFn = SemaRef.BuildPossibleImplicitMemberExpr(SS, TemplateKWLoc, R,
+ ExplicitTemplateArgs, S);
else if (ExplicitTemplateArgs || TemplateKWLoc.isValid())
NewFn = SemaRef.BuildTemplateIdExpr(SS, TemplateKWLoc, R, false,
ExplicitTemplateArgs);
@@ -10749,6 +11096,8 @@ bool Sema::buildOverloadedCallSet(Scope *S, Expr *Fn,
CallExpr *CE = new (Context) CallExpr(
Context, Fn, Args, Context.DependentTy, VK_RValue, RParenLoc);
CE->setTypeDependent(true);
+ CE->setValueDependent(true);
+ CE->setInstantiationDependent(true);
*Result = CE;
return true;
}
@@ -10800,9 +11149,23 @@ static ExprResult FinishOverloadedCallExpr(Sema &SemaRef, Scope *S, Expr *Fn,
if (!Recovery.isInvalid())
return Recovery;
- SemaRef.Diag(Fn->getLocStart(),
- diag::err_ovl_no_viable_function_in_call)
- << ULE->getName() << Fn->getSourceRange();
+ // If the user passes in a function that we can't take the address of, we
+ // generally end up emitting really bad error messages. Here, we attempt to
+ // emit better ones.
+ for (const Expr *Arg : Args) {
+ if (!Arg->getType()->isFunctionType())
+ continue;
+ if (auto *DRE = dyn_cast<DeclRefExpr>(Arg->IgnoreParenImpCasts())) {
+ auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl());
+ if (FD &&
+ !SemaRef.checkAddressOfFunctionIsAvailable(FD, /*Complain=*/true,
+ Arg->getExprLoc()))
+ return ExprError();
+ }
+ }
+
+ SemaRef.Diag(Fn->getLocStart(), diag::err_ovl_no_viable_function_in_call)
+ << ULE->getName() << Fn->getSourceRange();
CandidateSet->NoteCandidates(SemaRef, OCD_AllCandidates, Args);
break;
}
@@ -10875,8 +11238,7 @@ static bool IsOverloaded(const UnresolvedSetImpl &Functions) {
///
/// \param OpLoc The location of the operator itself (e.g., '*').
///
-/// \param OpcIn The UnaryOperator::Opcode that describes this
-/// operator.
+/// \param Opc The UnaryOperatorKind that describes this operator.
///
/// \param Fns The set of non-member functions that will be
/// considered by overload resolution. The caller needs to build this
@@ -10887,11 +11249,9 @@ static bool IsOverloaded(const UnresolvedSetImpl &Functions) {
///
/// \param Input The input argument.
ExprResult
-Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, unsigned OpcIn,
+Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
const UnresolvedSetImpl &Fns,
Expr *Input) {
- UnaryOperator::Opcode Opc = static_cast<UnaryOperator::Opcode>(OpcIn);
-
OverloadedOperatorKind Op = UnaryOperator::getOverloadedOperator(Opc);
assert(Op != OO_None && "Invalid opcode for overloaded unary operator");
DeclarationName OpName = Context.DeclarationNames.getCXXOperatorName(Op);
@@ -11062,8 +11422,7 @@ Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, unsigned OpcIn,
///
/// \param OpLoc The location of the operator itself (e.g., '+').
///
-/// \param OpcIn The BinaryOperator::Opcode that describes this
-/// operator.
+/// \param Opc The BinaryOperatorKind that describes this operator.
///
/// \param Fns The set of non-member functions that will be
/// considered by overload resolution. The caller needs to build this
@@ -11076,13 +11435,12 @@ Sema::CreateOverloadedUnaryOp(SourceLocation OpLoc, unsigned OpcIn,
/// \param RHS Right-hand argument.
ExprResult
Sema::CreateOverloadedBinOp(SourceLocation OpLoc,
- unsigned OpcIn,
+ BinaryOperatorKind Opc,
const UnresolvedSetImpl &Fns,
Expr *LHS, Expr *RHS) {
Expr *Args[2] = { LHS, RHS };
LHS=RHS=nullptr; // Please use only Args instead of LHS/RHS couple
- BinaryOperator::Opcode Opc = static_cast<BinaryOperator::Opcode>(OpcIn);
OverloadedOperatorKind Op = BinaryOperator::getOverloadedOperator(Opc);
DeclarationName OpName = Context.DeclarationNames.getCXXOperatorName(Op);
@@ -11565,10 +11923,6 @@ Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
<< (qualsString.find(' ') == std::string::npos ? 1 : 2);
}
- if (resultType->isMemberPointerType())
- if (Context.getTargetInfo().getCXXABI().isMicrosoft())
- RequireCompleteType(LParenLoc, resultType, 0);
-
CXXMemberCallExpr *call
= new (Context) CXXMemberCallExpr(Context, MemExprE, Args,
resultType, valueKind, RParenLoc);
@@ -11767,18 +12121,39 @@ Sema::BuildCallToMemberFunction(Scope *S, Expr *MemExprE,
if (CheckFunctionCall(Method, TheCall, Proto))
return ExprError();
+ // In the case the method to call was not selected by the overloading
+ // resolution process, we still need to handle the enable_if attribute. Do
+ // that here, so it will not hide previous -- and more relevant -- errors
+ if (isa<MemberExpr>(NakedMemExpr)) {
+ if (const EnableIfAttr *Attr = CheckEnableIf(Method, Args, true)) {
+ Diag(MemExprE->getLocStart(),
+ diag::err_ovl_no_viable_member_function_in_call)
+ << Method << Method->getSourceRange();
+ Diag(Method->getLocation(),
+ diag::note_ovl_candidate_disabled_by_enable_if_attr)
+ << Attr->getCond()->getSourceRange() << Attr->getMessage();
+ return ExprError();
+ }
+ }
+
if ((isa<CXXConstructorDecl>(CurContext) ||
isa<CXXDestructorDecl>(CurContext)) &&
TheCall->getMethodDecl()->isPure()) {
const CXXMethodDecl *MD = TheCall->getMethodDecl();
- if (isa<CXXThisExpr>(MemExpr->getBase()->IgnoreParenCasts())) {
- Diag(MemExpr->getLocStart(),
+ if (isa<CXXThisExpr>(MemExpr->getBase()->IgnoreParenCasts()) &&
+ MemExpr->performsVirtualDispatch(getLangOpts())) {
+ Diag(MemExpr->getLocStart(),
diag::warn_call_to_pure_virtual_member_function_from_ctor_dtor)
<< MD->getDeclName() << isa<CXXDestructorDecl>(CurContext)
<< MD->getParent()->getDeclName();
Diag(MD->getLocStart(), diag::note_previous_decl) << MD->getDeclName();
+ if (getLangOpts().AppleKext)
+ Diag(MemExpr->getLocStart(),
+ diag::note_pure_qualified_call_kext)
+ << MD->getParent()->getDeclName()
+ << MD->getDeclName();
}
}
return MaybeBindToTemporary(TheCall);
@@ -12267,13 +12642,14 @@ ExprResult Sema::BuildLiteralOperatorCall(LookupResult &R,
/// otherwise CallExpr is set to ExprError() and some non-success value
/// is returned.
Sema::ForRangeStatus
-Sema::BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc,
- SourceLocation RangeLoc, VarDecl *Decl,
- BeginEndFunction BEF,
+Sema::BuildForRangeBeginEndCall(SourceLocation Loc,
+ SourceLocation RangeLoc,
const DeclarationNameInfo &NameInfo,
LookupResult &MemberLookup,
OverloadCandidateSet *CandidateSet,
Expr *Range, ExprResult *CallExpr) {
+ Scope *S = nullptr;
+
CandidateSet->clear();
if (!MemberLookup.empty()) {
ExprResult MemberRef =
@@ -12282,18 +12658,14 @@ Sema::BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc,
/*TemplateKWLoc=*/SourceLocation(),
/*FirstQualifierInScope=*/nullptr,
MemberLookup,
- /*TemplateArgs=*/nullptr);
+ /*TemplateArgs=*/nullptr, S);
if (MemberRef.isInvalid()) {
*CallExpr = ExprError();
- Diag(Range->getLocStart(), diag::note_in_for_range)
- << RangeLoc << BEF << Range->getType();
return FRS_DiagnosticIssued;
}
*CallExpr = ActOnCallExpr(S, MemberRef.get(), Loc, None, Loc, nullptr);
if (CallExpr->isInvalid()) {
*CallExpr = ExprError();
- Diag(Range->getLocStart(), diag::note_in_for_range)
- << RangeLoc << BEF << Range->getType();
return FRS_DiagnosticIssued;
}
} else {
@@ -12324,8 +12696,6 @@ Sema::BuildForRangeBeginEndCall(Scope *S, SourceLocation Loc,
/*AllowTypoCorrection=*/false);
if (CallExpr->isInvalid() || OverloadResult != OR_Success) {
*CallExpr = ExprError();
- Diag(Range->getLocStart(), diag::note_in_for_range)
- << RangeLoc << BEF << Range->getType();
return FRS_DiagnosticIssued;
}
}
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