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Re: [FORTRAN] Improved expansion of simple WHERE statements
- From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
- To: Jerry DeLisle <jvdelisle at verizon dot net>
- Cc: Roger Sayle <roger at eyesopen dot com>, fortran at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- Date: Sat, 4 Feb 2006 15:43:25 -0800
- Subject: Re: [FORTRAN] Improved expansion of simple WHERE statements
- References: <Pine.LNX.4.44.0602040829160.26691-100000@www.eyesopen.com> <43E53A59.5010502@verizon.net>
On Sat, Feb 04, 2006 at 03:35:53PM -0800, Jerry DeLisle wrote:
> Roger Sayle wrote:
> >
> >Ok for mainline? Could someone double check with NIST/LAPACK
> >that there are no complications with this change (though the
> >gfortran reviewers are usually excellent about this)? The
> >gfc_walk_expr API is scary, so I'd appreciate someone looking
> >over my usage of it. Some of the restrictions on which WHEREs
> >can be optimized could be lifted by improved scalarization.
> >
> I will try the patch on LAPACK and NIST.
>
I'm reading the patch now. It should have no effect and show
no bugs from NIST or LAPACK. NIST and LAPACK are Fortran 77
codes that pre-date WHERE (and TRANSPOSE and FORALL).
I'll note that I changed one of my codes because the use of a
simple WHERE caused memory usage to jump from 1GB to 2GB.
--
Steve