------- Comment #63 from rguenther at suse dot de 2008-03-30 15:56 ------- Subject: Re: VRP fails to eliminate range checks in Ada code
On Sun, 30 Mar 2008, ebotcazou at gcc dot gnu dot org wrote: > ------- Comment #62 from ebotcazou at gcc dot gnu dot org 2008-03-30 15:45 > ------- > > Yes, even with -gnato. With -gnato it checks that the > > addition doesn't overflow. > > Oh, sorry, I thought we were talking about the overflow check... > > > But there are no checks on the array access. It looks like the f-e > > doesn't generate them in the first place (as opposed to fold or gigi > > making a mistake). > > This is as documented in the GNAT manual, section 3.2.4 Validity Checking. > You need to pass -gnatVs to have them. So even GNAT assumes parameter values are in-range? Wouldn't that cause an bounded error to become an unbounded error if it were out-of-range? I'm somewhat confused on what the Ada language specification is and what is GNAT implementation freedom... Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30911
