An objc_retain can serve as a may-use for a different pointer.

rdar://11931823.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160637 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/ObjCARC.cpp

@@ -2829,7 +2829,10 @@ ObjCARCOpt::VisitInstructionTopDown(Instruction *Inst,
     }
 
     S.IncrementNestCount();
-    return NestingDetected;
+
+    // A retain can be a potential use; procede to the generic checking
+    // code below.
+    break;
   }
   case IC_Release: {
     Arg = GetObjCArg(Inst);