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objc-gc: Adds support for "weak" property attribute under GC. 

// rdar://10073896

llvm-svn: 139203
This commit is contained in:
Fariborz Jahanian 2011-09-06 23:32:40 +00:00
parent 5b5c953b07
commit 6dd3f39dae
2 changed files with 34 additions and 0 deletions
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6
clang/lib/Sema/SemaObjCProperty.cpp
View File

@ -594,6 +594,12 @@ Decl *Sema::ActOnPropertyImplDecl(Scope *S,
ObjCPropertyDecl::PropertyAttributeKind kind
= property->getPropertyAttributes();
QualType PropType = Context.getCanonicalType(property->getType());
bool PropertyIsGCWeak = (kind & ObjCPropertyDecl::OBJC_PR_weak &&
!getLangOptions().ObjCAutoRefCount &&
getLangOptions().getGCMode() !=
LangOptions::NonGC);
if (PropertyIsGCWeak)
PropType = Context.getObjCGCQualType(PropType, Qualifiers::Weak);
QualType PropertyIvarType = PropType;
if (PropType->isReferenceType())
PropertyIvarType = cast<ReferenceType>(PropType)->getPointeeType();

28
clang/test/CodeGenObjC/gc-weak-attribute.m Normal file
View File

@ -0,0 +1,28 @@
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fobjc-gc -fobjc-nonfragile-abi -emit-llvm -o - %s | FileCheck %s
// rdar://10073896
@interface I
{
__weak id wObject;
}
@property (readwrite, weak) id representedObject;
@property (readwrite, weak) id wObject;
@property (readwrite, weak) __weak id wRandom;
@property (readwrite, assign) __weak id wAnother;
@end
@implementation I
@synthesize representedObject;
@synthesize wObject;
@synthesize wRandom;
@synthesize wAnother;
@end
// CHECK: call i8* @objc_read_weak
// CHECK: call i8* @objc_assign_weak
// CHECK: call i8* @objc_read_weak
// CHECK: call i8* @objc_assign_weak
// CHECK: call i8* @objc_read_weak
// CHECK: call i8* @objc_assign_weak
// CHECK: call i8* @objc_read_weak
// CHECK: call i8* @objc_assign_weak