forked from OSchip/llvm-project
[Objective-C] Fix __weak type traits with -fobjc-weak
Summary: Similar to ARC, in ObjCWeak Objective-C object pointers qualified with a weak lifetime are not POD or trivial types. Update the type trait code to reflect this. Copy and adapt the arc-type-traits.mm test case to verify correctness. Reviewers: rsmith, doug.gregor, rjmccall Reviewed By: rjmccall Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D31004 llvm-svn: 299010
This commit is contained in:
Brian Kelley
parent
ce539b54e3
commit
93c640b986
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@ -2023,20 +2023,8 @@ bool QualType::isCXX98PODType(const ASTContext &Context) const {
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if ((*this)->isIncompleteType())
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return false;
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if (Context.getLangOpts().ObjCAutoRefCount) {
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switch (getObjCLifetime()) {
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case Qualifiers::OCL_ExplicitNone:
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return true;
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case Qualifiers::OCL_Strong:
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case Qualifiers::OCL_Weak:
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case Qualifiers::OCL_Autoreleasing:
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return false;
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case Qualifiers::OCL_None:
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break;
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}
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}
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if (hasNonTrivialObjCLifetime())
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return false;
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QualType CanonicalType = getTypePtr()->CanonicalType;
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switch (CanonicalType->getTypeClass()) {
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@ -2085,22 +2073,8 @@ bool QualType::isTrivialType(const ASTContext &Context) const {
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if ((*this)->isIncompleteType())
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return false;
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if (Context.getLangOpts().ObjCAutoRefCount) {
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switch (getObjCLifetime()) {
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case Qualifiers::OCL_ExplicitNone:
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return true;
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case Qualifiers::OCL_Strong:
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case Qualifiers::OCL_Weak:
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case Qualifiers::OCL_Autoreleasing:
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return false;
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case Qualifiers::OCL_None:
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if ((*this)->isObjCLifetimeType())
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return false;
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break;
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}
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}
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if (hasNonTrivialObjCLifetime())
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return false;
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QualType CanonicalType = getTypePtr()->CanonicalType;
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if (CanonicalType->isDependentType())
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@ -2137,22 +2111,8 @@ bool QualType::isTriviallyCopyableType(const ASTContext &Context) const {
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if ((*this)->isArrayType())
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return Context.getBaseElementType(*this).isTriviallyCopyableType(Context);
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if (Context.getLangOpts().ObjCAutoRefCount) {
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switch (getObjCLifetime()) {
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case Qualifiers::OCL_ExplicitNone:
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return true;
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case Qualifiers::OCL_Strong:
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case Qualifiers::OCL_Weak:
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case Qualifiers::OCL_Autoreleasing:
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return false;
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case Qualifiers::OCL_None:
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if ((*this)->isObjCLifetimeType())
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return false;
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break;
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}
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}
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if (hasNonTrivialObjCLifetime())
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return false;
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// C++11 [basic.types]p9
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// Scalar types, trivially copyable class types, arrays of such types, and
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@ -2298,20 +2258,8 @@ bool QualType::isCXX11PODType(const ASTContext &Context) const {
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if (ty->isDependentType())
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return false;
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if (Context.getLangOpts().ObjCAutoRefCount) {
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switch (getObjCLifetime()) {
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case Qualifiers::OCL_ExplicitNone:
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return true;
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case Qualifiers::OCL_Strong:
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case Qualifiers::OCL_Weak:
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case Qualifiers::OCL_Autoreleasing:
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return false;
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case Qualifiers::OCL_None:
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break;
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}
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}
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if (hasNonTrivialObjCLifetime())
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return false;
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// C++11 [basic.types]p9:
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// Scalar types, POD classes, arrays of such types, and cv-qualified
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@ -4518,25 +4518,6 @@ static bool EvaluateUnaryTypeTrait(Sema &Self, TypeTrait UTT,
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}
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}
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/// \brief Determine whether T has a non-trivial Objective-C lifetime in
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/// ARC mode.
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static bool hasNontrivialObjCLifetime(QualType T) {
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switch (T.getObjCLifetime()) {
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case Qualifiers::OCL_ExplicitNone:
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return false;
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case Qualifiers::OCL_Strong:
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case Qualifiers::OCL_Weak:
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case Qualifiers::OCL_Autoreleasing:
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return true;
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case Qualifiers::OCL_None:
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return T->isObjCLifetimeType();
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}
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llvm_unreachable("Unknown ObjC lifetime qualifier");
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}
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static bool EvaluateBinaryTypeTrait(Sema &Self, TypeTrait BTT, QualType LhsT,
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QualType RhsT, SourceLocation KeyLoc);
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@ -4630,10 +4611,9 @@ static bool evaluateTypeTrait(Sema &S, TypeTrait Kind, SourceLocation KWLoc,
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return S.canThrow(Result.get()) == CT_Cannot;
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if (Kind == clang::TT_IsTriviallyConstructible) {
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// Under Objective-C ARC, if the destination has non-trivial Objective-C
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// lifetime, this is a non-trivial construction.
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if (S.getLangOpts().ObjCAutoRefCount &&
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hasNontrivialObjCLifetime(T.getNonReferenceType()))
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// Under Objective-C ARC and Weak, if the destination has non-trivial
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// Objective-C lifetime, this is a non-trivial construction.
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if (T.getNonReferenceType().hasNonTrivialObjCLifetime())
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return false;
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// The initialization succeeded; now make sure there are no non-trivial
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@ -4852,10 +4832,9 @@ static bool EvaluateBinaryTypeTrait(Sema &Self, TypeTrait BTT, QualType LhsT,
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return Self.canThrow(Result.get()) == CT_Cannot;
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if (BTT == BTT_IsTriviallyAssignable) {
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// Under Objective-C ARC, if the destination has non-trivial Objective-C
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// lifetime, this is a non-trivial assignment.
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if (Self.getLangOpts().ObjCAutoRefCount &&
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hasNontrivialObjCLifetime(LhsT.getNonReferenceType()))
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// Under Objective-C ARC and Weak, if the destination has non-trivial
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// Objective-C lifetime, this is a non-trivial assignment.
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if (LhsT.getNonReferenceType().hasNonTrivialObjCLifetime())
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return false;
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return !Result.get()->hasNonTrivialCall(Self.Context);
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@ -0,0 +1,210 @@
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// RUN: %clang_cc1 -fsyntax-only -fobjc-weak -fobjc-runtime-has-weak -verify -std=c++11 %s
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// expected-no-diagnostics
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// Check the results of the various type-trait query functions on
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// lifetime-qualified types in ObjC Weak.
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#define TRAIT_IS_TRUE(Trait, Type) static_assert(Trait(Type), "")
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#define TRAIT_IS_FALSE(Trait, Type) static_assert(!Trait(Type), "")
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#define TRAIT_IS_TRUE_2(Trait, Type1, Type2) static_assert(Trait(Type1, Type2), "")
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#define TRAIT_IS_FALSE_2(Trait, Type1, Type2) static_assert(!Trait(Type1, Type2), "")
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struct HasStrong { id obj; };
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struct HasWeak { __weak id obj; };
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struct HasUnsafeUnretained { __unsafe_unretained id obj; };
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// __has_nothrow_assign
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TRAIT_IS_TRUE(__has_nothrow_assign, __strong id);
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TRAIT_IS_TRUE(__has_nothrow_assign, __weak id);
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TRAIT_IS_TRUE(__has_nothrow_assign, __autoreleasing id);
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TRAIT_IS_TRUE(__has_nothrow_assign, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_nothrow_assign, HasStrong);
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TRAIT_IS_TRUE(__has_nothrow_assign, HasWeak);
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TRAIT_IS_TRUE(__has_nothrow_assign, HasUnsafeUnretained);
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// __has_nothrow_copy
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TRAIT_IS_TRUE(__has_nothrow_copy, __strong id);
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TRAIT_IS_TRUE(__has_nothrow_copy, __weak id);
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TRAIT_IS_TRUE(__has_nothrow_copy, __autoreleasing id);
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TRAIT_IS_TRUE(__has_nothrow_copy, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_nothrow_copy, HasStrong);
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TRAIT_IS_TRUE(__has_nothrow_copy, HasWeak);
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TRAIT_IS_TRUE(__has_nothrow_copy, HasUnsafeUnretained);
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// __has_nothrow_constructor
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TRAIT_IS_TRUE(__has_nothrow_constructor, __strong id);
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TRAIT_IS_TRUE(__has_nothrow_constructor, __weak id);
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TRAIT_IS_TRUE(__has_nothrow_constructor, __autoreleasing id);
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TRAIT_IS_TRUE(__has_nothrow_constructor, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_nothrow_constructor, HasStrong);
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TRAIT_IS_TRUE(__has_nothrow_constructor, HasWeak);
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TRAIT_IS_TRUE(__has_nothrow_constructor, HasUnsafeUnretained);
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// __has_trivial_assign
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TRAIT_IS_TRUE(__has_trivial_assign, __strong id);
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TRAIT_IS_FALSE(__has_trivial_assign, __weak id);
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TRAIT_IS_TRUE(__has_trivial_assign, __autoreleasing id);
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TRAIT_IS_TRUE(__has_trivial_assign, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_trivial_assign, HasStrong);
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TRAIT_IS_FALSE(__has_trivial_assign, HasWeak);
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TRAIT_IS_TRUE(__has_trivial_assign, HasUnsafeUnretained);
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// __has_trivial_copy
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TRAIT_IS_TRUE(__has_trivial_copy, __strong id);
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TRAIT_IS_FALSE(__has_trivial_copy, __weak id);
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TRAIT_IS_TRUE(__has_trivial_copy, __autoreleasing id);
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TRAIT_IS_TRUE(__has_trivial_copy, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_trivial_copy, HasStrong);
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TRAIT_IS_FALSE(__has_trivial_copy, HasWeak);
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TRAIT_IS_TRUE(__has_trivial_copy, HasUnsafeUnretained);
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// __has_trivial_constructor
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TRAIT_IS_TRUE(__has_trivial_constructor, __strong id);
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TRAIT_IS_FALSE(__has_trivial_constructor, __weak id);
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TRAIT_IS_TRUE(__has_trivial_constructor, __autoreleasing id);
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TRAIT_IS_TRUE(__has_trivial_constructor, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_trivial_constructor, HasStrong);
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TRAIT_IS_FALSE(__has_trivial_constructor, HasWeak);
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TRAIT_IS_TRUE(__has_trivial_constructor, HasUnsafeUnretained);
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// __has_trivial_destructor
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TRAIT_IS_TRUE(__has_trivial_destructor, __strong id);
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TRAIT_IS_FALSE(__has_trivial_destructor, __weak id);
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TRAIT_IS_TRUE(__has_trivial_destructor, __autoreleasing id);
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TRAIT_IS_TRUE(__has_trivial_destructor, __unsafe_unretained id);
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TRAIT_IS_TRUE(__has_trivial_destructor, HasStrong);
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TRAIT_IS_FALSE(__has_trivial_destructor, HasWeak);
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TRAIT_IS_TRUE(__has_trivial_destructor, HasUnsafeUnretained);
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// __is_literal
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TRAIT_IS_TRUE(__is_literal, __strong id);
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TRAIT_IS_TRUE(__is_literal, __weak id);
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TRAIT_IS_TRUE(__is_literal, __autoreleasing id);
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TRAIT_IS_TRUE(__is_literal, __unsafe_unretained id);
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// __is_literal_type
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TRAIT_IS_TRUE(__is_literal_type, __strong id);
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TRAIT_IS_TRUE(__is_literal_type, __weak id);
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TRAIT_IS_TRUE(__is_literal_type, __autoreleasing id);
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TRAIT_IS_TRUE(__is_literal_type, __unsafe_unretained id);
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// __is_pod
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TRAIT_IS_TRUE(__is_pod, __strong id);
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TRAIT_IS_FALSE(__is_pod, __weak id);
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TRAIT_IS_TRUE(__is_pod, __autoreleasing id);
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TRAIT_IS_TRUE(__is_pod, __unsafe_unretained id);
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TRAIT_IS_TRUE(__is_pod, HasStrong);
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TRAIT_IS_FALSE(__is_pod, HasWeak);
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TRAIT_IS_TRUE(__is_pod, HasUnsafeUnretained);
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// __is_trivial
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TRAIT_IS_TRUE(__is_trivial, __strong id);
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TRAIT_IS_FALSE(__is_trivial, __weak id);
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TRAIT_IS_TRUE(__is_trivial, __autoreleasing id);
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TRAIT_IS_TRUE(__is_trivial, __unsafe_unretained id);
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TRAIT_IS_TRUE(__is_trivial, HasStrong);
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TRAIT_IS_FALSE(__is_trivial, HasWeak);
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TRAIT_IS_TRUE(__is_trivial, HasUnsafeUnretained);
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// __is_scalar
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TRAIT_IS_TRUE(__is_scalar, __strong id);
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TRAIT_IS_FALSE(__is_scalar, __weak id);
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TRAIT_IS_TRUE(__is_scalar, __autoreleasing id);
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TRAIT_IS_TRUE(__is_scalar, __unsafe_unretained id);
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// __is_standard_layout
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TRAIT_IS_TRUE(__is_standard_layout, __strong id);
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TRAIT_IS_TRUE(__is_standard_layout, __weak id);
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TRAIT_IS_TRUE(__is_standard_layout, __autoreleasing id);
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TRAIT_IS_TRUE(__is_standard_layout, __unsafe_unretained id);
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// __is_trivally_assignable
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __strong id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __weak id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __autoreleasing id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __strong id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __weak id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __autoreleasing id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __unsafe_unretained id&&);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __strong id);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __weak id);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __autoreleasing id);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __unsafe_unretained id);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __strong id&&);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __weak id&&);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __autoreleasing id&&);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __unsafe_unretained id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __strong id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __weak id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __autoreleasing id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __strong id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __weak id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __autoreleasing id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __unsafe_unretained id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __strong id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __weak id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __autoreleasing id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __strong id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __weak id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __autoreleasing id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __unsafe_unretained id&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, HasStrong&, HasStrong);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, HasStrong&, HasStrong&&);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, HasWeak&, HasWeak);
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TRAIT_IS_FALSE_2(__is_trivially_assignable, HasWeak&, HasWeak&&);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, HasUnsafeUnretained&, HasUnsafeUnretained);
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TRAIT_IS_TRUE_2(__is_trivially_assignable, HasUnsafeUnretained&, HasUnsafeUnretained&&);
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// __is_trivally_constructible
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TRAIT_IS_TRUE(__is_trivially_constructible, __strong id);
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TRAIT_IS_FALSE(__is_trivially_constructible, __weak id);
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TRAIT_IS_TRUE(__is_trivially_constructible, __autoreleasing id);
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TRAIT_IS_TRUE(__is_trivially_constructible, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __strong id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __weak id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __autoreleasing id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __strong id&&);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __weak id&&);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __autoreleasing id&&);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __unsafe_unretained id&&);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __strong id);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __weak id);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __autoreleasing id);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __unsafe_unretained id);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __strong id&&);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __weak id&&);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __autoreleasing id&&);
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TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __unsafe_unretained id&&);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __strong id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __weak id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __autoreleasing id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __unsafe_unretained id);
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TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __strong id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __weak id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __autoreleasing id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __unsafe_unretained id&&);
|
||||
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __strong id);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __weak id);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __autoreleasing id);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __unsafe_unretained id);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __strong id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __weak id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __autoreleasing id&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __unsafe_unretained id&&);
|
||||
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, HasStrong, HasStrong);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, HasStrong, HasStrong&&);
|
||||
TRAIT_IS_FALSE_2(__is_trivially_constructible, HasWeak, HasWeak);
|
||||
TRAIT_IS_FALSE_2(__is_trivially_constructible, HasWeak, HasWeak&&);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, HasUnsafeUnretained, HasUnsafeUnretained);
|
||||
TRAIT_IS_TRUE_2(__is_trivially_constructible, HasUnsafeUnretained, HasUnsafeUnretained&&);
|
||||
Loading…
Reference in New Issue