Re: "Fix alias slowdown" patch miscompiles 464.h264ref in SPEC CPU

["Daniel Berlin" <dberlin at dberlin dot org>]

Hey, by chance does the attached fix it?


On 12/10/06, Daniel Berlin <dberlin@dberlin.org> wrote:
> On 12/10/06, H. J. Lu <hjl@lucon.org> wrote:
> > 2006
> > Reply-To:
> >
> > Hi Daniel,
> >
> > Do you have access to SPEC CPU 2006?
>
> No, i don't, only SPEC CPU 2000.
>
> > Your patch
> >
> > http://gcc.gnu.org/ml/gcc-patches/2006-12/msg00225.html
> >
> > causes gcc 4.3 to miscompile 464.h264ref in SPEC CPU 2006 with
> > -O2 -ffast-math on Linux/x86-64. 464.h264ref compiled with gcc 4.3
> > generates incorrect output. We are working on a small testcase.
>
> There was a typo fix to this patch in a later revision that was
> necessary for correctness. I have no idea what rev "gcc 4.3" refers
> to, so i can't tell you if what you are testing is new enough or not
> :)
>
> If you can get me a testcase, i can fix it.

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