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Date: Mon, 11 Apr 2011 16:45:00 -0000
Message-ID: <BANLkTinR1XsZcNY1rPDnksB72NsdW_8Guw@mail.gmail.com>
Subject: Re: Implement stack arrays even for unknown sizes
From: Steven Bosscher <stevenb.gcc@gmail.com>
To: Michael Matz <matz@suse.de>
Cc: Paul Richard Thomas <paul.richard.thomas@gmail.com>, Dominique Dhumieres <dominiq@lps.ens.fr>, 	fortran@gcc.gnu.org, gcc-patches@gcc.gnu.org
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On Mon, Apr 11, 2011 at 6:04 PM, Michael Matz <matz@suse.de> wrote:
> On Sat, 9 Apr 2011, Paul Richard Thomas wrote:
>
>> I find that both nf.f90 and capacita.f90 segfault in runtime for any
>> stack size.
>
> Try this patch. =A0I've verified that capacita and nf work with it and
> -march=3Dnative -ffast-math -funroll-loops -fstack-arrays -O3 . =A0In fac=
t all
> of polyhedron works for me on these flags. =A0(I've set a ulimit -s of
> 512MB, but I don't know if such a large amount is required).

FWIW, I don't think it is reasonable to require ulimit -s to run
polyhedron. Isn't there a way to put a maximum on the size of the
arrays on stack, e.g. -fstack-arrays-limit=3D or something like that?

BTW why does trans-array need gimple.h?

Ciao!
Steven