objc-gc: Adds support for "weak" property attribute under GC.
// rdar://10073896
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139203 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 84052fd..bf4939d 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -594,6 +594,12 @@
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();
diff --git a/test/CodeGenObjC/gc-weak-attribute.m b/test/CodeGenObjC/gc-weak-attribute.m
new file mode 100644
index 0000000..44a9177
--- /dev/null
+++ b/test/CodeGenObjC/gc-weak-attribute.m
@@ -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
+
