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[Bug tree-optimization/30911] VRP fails to eliminate range checks in Ada code
- From: "baldrick at free dot fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Mar 2008 15:16:45 -0000
- Subject: [Bug tree-optimization/30911] VRP fails to eliminate range checks in Ada code
- References: <bug-30911-13647@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #61 from baldrick at free dot fr 2008-03-30 15:16 -------
Subject: Re: VRP fails to eliminate range checks in Ada code
> > 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!
>
> Even with -gnato?
Yes, even with -gnato. With -gnato it checks that the
addition doesn't overflow. 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).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30911