objc: deprecate direct usage of 'isa' of objc objects
in favor of usage of api's intended for.
// rdar://8290002
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148404 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprMember.cpp b/lib/Sema/SemaExprMember.cpp
index 82249df..6bff219 100644
--- a/lib/Sema/SemaExprMember.cpp
+++ b/lib/Sema/SemaExprMember.cpp
@@ -1114,10 +1114,12 @@
goto fail;
// There's an implicit 'isa' ivar on all objects.
// But we only actually find it this way on objects of type 'id',
- // apparently.
- if (OTy->isObjCId() && Member->isStr("isa"))
+ // apparently.ghjg
+ if (OTy->isObjCId() && Member->isStr("isa")) {
+ Diag(MemberLoc, diag::warn_objc_isa_use);
return Owned(new (Context) ObjCIsaExpr(BaseExpr.take(), IsArrow, MemberLoc,
Context.getObjCClassType()));
+ }
if (ShouldTryAgainWithRedefinitionType(*this, BaseExpr))
return LookupMemberExpr(R, BaseExpr, IsArrow, OpLoc, SS,