[Bug middle-end/42298] [4.5 Regression] GCC fails validity in mdbx in polyhedral benchmark.

["nemokingdom at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from nemokingdom at gmail dot com  2009-12-07 13:01 -------
Subject: Re:  [4.5 Regression] GCC fails validity in 
        mdbx in polyhedral benchmark.

Hi Rguenth,
On Mon, Dec 7, 2009 at 7:14 PM, rguenth at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
>
> ------- Comment #2 from rguenth at gcc dot gnu dot org ?2009-12-07 11:14 -------
> Huh? ?Does plain -O2 work? ?Do I understand correctly that -O2 -fno-loop-block
> -fno-loop-strip-mine miscompiles?

Em, this benchmark can be compiled, but failed at validity of the benchmark
testing (passed 39 of 40). So I think this caused a runtime error.

-O2 also has this fail. I disable Graphite by -fno-loop-strip-mine
-fno-loop-block.
So I think it's not related to Graphite.

>
> Sebastian, how can disabling graphite options but not enabling graphite
> miscompile anything?? ?P1, please fix / comment.
>
>
> --
>
> rguenth at gcc dot gnu dot org changed:
>
> ? ? ? ? ? What ? ?|Removed ? ? ? ? ? ? ? ? ? ? |Added
> ----------------------------------------------------------------------------
> ? ? ? ? ? ? ? ? CC| ? ? ? ? ? ? ? ? ? ? ? ? ? ?|spop at gcc dot gnu dot org
> ? ? ? ? ? Keywords| ? ? ? ? ? ? ? ? ? ? ? ? ? ?|wrong-code
> ? ? ? ? ? Priority|P3 ? ? ? ? ? ? ? ? ? ? ? ? ?|P1
> ? ? ? ? ? ?Summary|GCC fails validity in mdbx ?|[4.5 Regression] GCC fails
> ? ? ? ? ? ? ? ? ? |in polyhedral benchmark. ? ?|validity in mdbx in
> ? ? ? ? ? ? ? ? ? | ? ? ? ? ? ? ? ? ? ? ? ? ? ?|polyhedral benchmark.
> ? Target Milestone|--- ? ? ? ? ? ? ? ? ? ? ? ? |4.5.0
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42298
>
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>

Li


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42298