------- Comment #57 from rguenther at suse dot de 2008-03-30 14:52 ------- Subject: Re: VRP fails to eliminate range checks in Ada code
On Sun, 30 Mar 2008, baldrick at gcc dot gnu dot org wrote: > ------- Comment #55 from baldrick at gcc dot gnu dot org 2008-03-30 14:18 > ------- > And here's a testcase that was supposed to check that > VRP is not removing checks that array accesses are in > range. Instead it shows that the Ada f-e is failing > to generate checks at all! > > function Overflow (X : Positive) return Integer is > Y : Positive; > A : array (Positive) of Integer; > pragma Import (Ada, A); > begin > return A (X) + A (Y); > end; Or that fold is clever enough (again) to remove the check - I'm sure it has special code dealing with >= 0 checks on unsigned types ;) Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30911
