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Re: PATCH: fortran/27662: Transpose doesn't work on function return
On Fri, May 19, 2006 at 04:34:26PM +0100, Richard Sandiford wrote:
> Steve Kargl <sgk@troutmask.apl.washington.edu> writes:
> > On Thu, May 18, 2006 at 10:35:11PM -0700, H. J. Lu wrote:
> >> We zere the first stride to indicate a temporary. But if the first
> >> stride of the temporary is used later, we will get the wrong result
> >> as in PR fortran/27662. Does anyone know why we do this? Do we have
> >> a testcase to show it is needed?
> >>
> >> This patch fixes PR fortran/27662. But I have no ideas if it is the
> >> correct fix.
> >
> > Richard Sandiford wrote much of the optimizations that
> > are applied to transpose. I sent him an email earlier
> > today asking him if he had some spare time to look
> > at this PR.
>
> However, the use of zero strides for temporaries was an existing
> situation, not something specific to the tranpose optimisations.
> I'm afraid I don't know gfortran well enough to say whether it's
> still needed. It looks like Paul has taken up the patch (thanks Paul!)
> and he knows this stuff much better than I do.
>
Thanks for following up.
--
Steve