objective-C: When implementing custom accessor method for
a property, the -Wdirect-ivar-access should not warn when
accessing the property's synthesized instance variable.
// rdar://13142820
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175195 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 1fe88a2..e238b7e 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -1541,6 +1541,33 @@
}
}
+/// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
+/// an ivar synthesized for 'Method' and 'Method' is a property accessor
+/// declared in class 'IFace'.
+bool
+Sema::IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace,
+ ObjCMethodDecl *Method, ObjCIvarDecl *IV) {
+ if (!IV->getSynthesize())
+ return false;
+ ObjCMethodDecl *IMD = IFace->lookupMethod(Method->getSelector(),
+ Method->isInstanceMethod());
+ if (!IMD || !IMD->isPropertyAccessor())
+ return false;
+
+ // look up a property declaration whose one of its accessors is implemented
+ // by this method.
+ for (ObjCContainerDecl::prop_iterator P = IFace->prop_begin(),
+ E = IFace->prop_end(); P != E; ++P) {
+ ObjCPropertyDecl *property = *P;
+ if ((property->getGetterName() == IMD->getSelector() ||
+ property->getSetterName() == IMD->getSelector()) &&
+ (property->getPropertyIvarDecl() == IV))
+ return true;
+ }
+ return false;
+}
+
+
/// \brief Default synthesizes all properties which must be synthesized
/// in class's \@implementation.
void Sema::DefaultSynthesizeProperties(Scope *S, ObjCImplDecl* IMPDecl,