3114     ACC_bottom,  enumerator
3124     if (left == ACC_bottom) return right;  in merge()
3125     if (right == ACC_bottom) return left;  in merge()
3162         return ACC_bottom;  in VisitExpr()
3170       if (isAnyRetainable(TargetClass)) return ACC_bottom;  in VisitObjCStringLiteral()
3179           return ACC_bottom;  in VisitCastExpr()
3235           return ACC_bottom;  in VisitDeclRefExpr()
3275         return ACC_bottom;  in checkCallToFunction()
3520     assert(CreateRule != ACC_bottom && "This cast should already be accepted.");  in diagnoseObjCARCConversion()
3561     assert(CreateRule != ACC_bottom && "This cast should already be accepted.");  in diagnoseObjCARCConversion()
4032   case ACC_bottom:  in CheckObjCARCConversion()