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Re: Preliminary patch for PR23820 and PR24309

From: "Sebastian Pop" <sebpop at gmail dot com>
To: "Zdenek Dvorak" <rakdver at kam dot mff dot cuni dot cz>
Cc: "GCC Patches" <gcc-patches at gcc dot gnu dot org>, "Daniel Berlin" <dberlin at dberlin dot org>
Date: Tue, 16 Oct 2007 16:41:14 -0500
Subject: Re: Preliminary patch for PR23820 and PR24309
References: <cb9d34b20710151037v1e5adc77pc123193e8e6aa235@mail.gmail.com> <20071015174912.GA2890@kam.mff.cuni.cz>

On 10/15/07, Zdenek Dvorak <rakdver@kam.mff.cuni.cz> wrote:
> > After this patch, as we won't have other PRs open on the loop
> > interchange (otherwise ping me on these and I'll give them a look),
> > would it be possible to enable loop interchange at -O3 or -O2 level?
>
> I think enabling it at -O3 for now would be a good idea,
>

I just bootstrapped and tested a patch with loop interchange
enabled at -O3, and there were 6 regressions with it:

gfortran.sum gfortran.dg/alloc_comp_assign_2.f90
gfortran.sum gfortran.dg/pr19928-2.f90
gfortran.sum gfortran.fortran-torture/execute/scalarize2.f90
gfortran.sum gfortran.fortran-torture/execute/scalarize.f90
gfortran.sum gfortran.fortran-torture/execute/where_1.f90
gfortran.sum gfortran.fortran-torture/execute/where_6.f90

They are all failing the execution test for -O3.  I'll have a look at
these fails before proposing a patch to enable loop interchange
at -O3.

-- 
Sebastian dot Pop at AMD dot com

References:
- Re: Preliminary patch for PR23820 and PR24309
  - From: Sebastian Pop
- Re: Preliminary patch for PR23820 and PR24309
  - From: Zdenek Dvorak

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