r299015 - [Objective-C] Miscellaneous -fobjc-weak Fixes
Brian Kelley via cfe-commits
cfe-commits at lists.llvm.org
Wed Mar 29 11:16:38 PDT 2017
Author: bkelley
Date: Wed Mar 29 13:16:38 2017
New Revision: 299015
URL: http://llvm.org/viewvc/llvm-project?rev=299015&view=rev
Log:
[Objective-C] Miscellaneous -fobjc-weak Fixes
Summary: After examining the remaining uses of LangOptions.ObjCAutoRefCount, found a some additional places to also check for ObjCWeak not covered by previous test cases. Added a test file to verify all the code paths that were changed.
Reviewers: rsmith, doug.gregor, rjmccall
Reviewed By: rjmccall
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D31007
Added:
cfe/trunk/test/SemaObjCXX/objc-weak.mm
Modified:
cfe/trunk/lib/Sema/SemaCast.cpp
cfe/trunk/lib/Sema/SemaDecl.cpp
cfe/trunk/lib/Sema/SemaDeclCXX.cpp
cfe/trunk/lib/Sema/SemaInit.cpp
Modified: cfe/trunk/lib/Sema/SemaCast.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaCast.cpp?rev=299015&r1=299014&r2=299015&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaCast.cpp (original)
+++ cfe/trunk/lib/Sema/SemaCast.cpp Wed Mar 29 13:16:38 2017
@@ -871,7 +871,7 @@ void CastOperation::CheckReinterpretCast
}
SrcExpr = ExprError();
} else if (tcr == TC_Success) {
- if (Self.getLangOpts().ObjCAutoRefCount)
+ if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers())
checkObjCConversion(Sema::CCK_OtherCast);
DiagnoseReinterpretUpDownCast(Self, SrcExpr.get(), DestType, OpRange);
}
@@ -935,7 +935,7 @@ void CastOperation::CheckStaticCast() {
} else if (tcr == TC_Success) {
if (Kind == CK_BitCast)
checkCastAlign();
- if (Self.getLangOpts().ObjCAutoRefCount)
+ if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers())
checkObjCConversion(Sema::CCK_OtherCast);
} else if (Kind == CK_BitCast) {
checkCastAlign();
Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=299015&r1=299014&r2=299015&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Wed Mar 29 13:16:38 2017
@@ -14468,7 +14468,7 @@ void Sema::ActOnFields(Scope *S, SourceL
// Verify that all the fields are okay.
SmallVector<FieldDecl*, 32> RecFields;
- bool ARCErrReported = false;
+ bool ObjCFieldLifetimeErrReported = false;
for (ArrayRef<Decl *>::iterator i = Fields.begin(), end = Fields.end();
i != end; ++i) {
FieldDecl *FD = cast<FieldDecl>(*i);
@@ -14603,16 +14603,16 @@ void Sema::ActOnFields(Scope *S, SourceL
<< FixItHint::CreateInsertion(FD->getLocation(), "*");
QualType T = Context.getObjCObjectPointerType(FD->getType());
FD->setType(T);
- } else if (getLangOpts().ObjCAutoRefCount && Record && !ARCErrReported &&
+ } else if (getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() &&
+ Record && !ObjCFieldLifetimeErrReported &&
(!getLangOpts().CPlusPlus || Record->isUnion())) {
- // It's an error in ARC if a field has lifetime.
+ // It's an error in ARC or Weak if a field has lifetime.
// We don't want to report this in a system header, though,
// so we just make the field unavailable.
// FIXME: that's really not sufficient; we need to make the type
// itself invalid to, say, initialize or copy.
QualType T = FD->getType();
- Qualifiers::ObjCLifetime lifetime = T.getObjCLifetime();
- if (lifetime && lifetime != Qualifiers::OCL_ExplicitNone) {
+ if (T.hasNonTrivialObjCLifetime()) {
SourceLocation loc = FD->getLocation();
if (getSourceManager().isInSystemHeader(loc)) {
if (!FD->hasAttr<UnavailableAttr>()) {
@@ -14623,7 +14623,7 @@ void Sema::ActOnFields(Scope *S, SourceL
Diag(FD->getLocation(), diag::err_arc_objc_object_in_tag)
<< T->isBlockPointerType() << Record->getTagKind();
}
- ARCErrReported = true;
+ ObjCFieldLifetimeErrReported = true;
}
} else if (getLangOpts().ObjC1 &&
getLangOpts().getGC() != LangOptions::NonGC &&
Modified: cfe/trunk/lib/Sema/SemaDeclCXX.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclCXX.cpp?rev=299015&r1=299014&r2=299015&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclCXX.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclCXX.cpp Wed Mar 29 13:16:38 2017
@@ -7145,8 +7145,7 @@ static bool checkTrivialClassMembers(Sem
// [...] nontrivally ownership-qualified types are [...] not trivially
// default constructible, copy constructible, move constructible, copy
// assignable, move assignable, or destructible [...]
- if (S.getLangOpts().ObjCAutoRefCount &&
- FieldType.hasNonTrivialObjCLifetime()) {
+ if (FieldType.hasNonTrivialObjCLifetime()) {
if (Diagnose)
S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership)
<< RD << FieldType.getObjCLifetime();
Modified: cfe/trunk/lib/Sema/SemaInit.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaInit.cpp?rev=299015&r1=299014&r2=299015&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaInit.cpp (original)
+++ cfe/trunk/lib/Sema/SemaInit.cpp Wed Mar 29 13:16:38 2017
@@ -6687,14 +6687,10 @@ InitializationSequence::Perform(Sema &S,
/*IsInitializerList=*/false,
ExtendingEntity->getDecl());
- // If we're binding to an Objective-C object that has lifetime, we
- // need cleanups. Likewise if we're extending this temporary to automatic
- // storage duration -- we need to register its cleanup during the
- // full-expression's cleanups.
- if ((S.getLangOpts().ObjCAutoRefCount &&
- MTE->getType()->isObjCLifetimeType()) ||
- (MTE->getStorageDuration() == SD_Automatic &&
- MTE->getType().isDestructedType()))
+ // If we're extending this temporary to automatic storage duration -- we
+ // need to register its cleanup during the full-expression's cleanups.
+ if (MTE->getStorageDuration() == SD_Automatic &&
+ MTE->getType().isDestructedType())
S.Cleanup.setExprNeedsCleanups(true);
CurInit = MTE;
Added: cfe/trunk/test/SemaObjCXX/objc-weak.mm
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjCXX/objc-weak.mm?rev=299015&view=auto
==============================================================================
--- cfe/trunk/test/SemaObjCXX/objc-weak.mm (added)
+++ cfe/trunk/test/SemaObjCXX/objc-weak.mm Wed Mar 29 13:16:38 2017
@@ -0,0 +1,28 @@
+// RUN: %clang_cc1 -fsyntax-only -fobjc-runtime-has-weak -fobjc-weak -fblocks -Wno-objc-root-class -std=c++98 -Wno-c++0x-extensions -verify %s
+
+ at interface AnObject
+ at property(weak) id value;
+ at end
+
+__attribute__((objc_arc_weak_reference_unavailable))
+ at interface NOWEAK : AnObject // expected-note 2 {{class is declared here}}
+ at end
+
+struct S {
+ __weak id a; // expected-note {{because type 'S' has a member with __weak ownership}}
+};
+
+union U {
+ __weak id a; // expected-error {{ARC forbids Objective-C objects in union}}
+ S b; // expected-error {{union member 'b' has a non-trivial copy constructor}}
+};
+
+void testCast(AnObject *o) {
+ __weak id a = reinterpret_cast<__weak NOWEAK *>(o); // expected-error {{class is incompatible with __weak references}} \
+ // expected-error {{explicit ownership qualifier on cast result has no effect}} \
+ // expected-error {{assignment of a weak-unavailable object to a __weak object}}
+
+ __weak id b = static_cast<__weak NOWEAK *>(o); // expected-error {{class is incompatible with __weak references}} \
+ // expected-error {{explicit ownership qualifier on cast result has no effect}} \
+ // expected-error {{assignment of a weak-unavailable object to a __weak object}}
+}
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