[Bug tree-optimization/55022] [4.8 Regression] air.f90 is miscompliled with -m64 -O2 -fgraphite-identity after revision 190619

mircea.namolaru at inria dot fr gcc-bugzilla@gcc.gnu.org
Wed Apr 23 08:58:00 GMT 2014


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55022

--- Comment #27 from Mircea Namolaru <mircea.namolaru at inria dot fr> ---
Hi,

Many thanks. 

I've passed over the meta-bug opened by you for Graphite,
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59859 and seems to me
that many of the problem have been already solved (some by you) or at least 
as in case of some compile-time/memory usage/missed optimization issues
we know how to solve it - some form of delinearization of array accesses 
that for sure was not for GCC 4.9. 

Btw, there is also another Graphite bug in this list
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59586 that was solved but didn't 
make it for GCC 4.9.0.

Mircea


----- Original Message -----
> From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
> To: "mircea namolaru" <mircea.namolaru@inria.fr>
> Sent: Tuesday, April 22, 2014 3:34:09 PM
> Subject: [Bug tree-optimization/55022] [4.8 Regression] air.f90 is miscompliled with -m64 -O2 -fgraphite-identity
> after revision 190619
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55022
> 
> --- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
> Author: rguenth
> Date: Tue Apr 22 13:33:37 2014
> New Revision: 209633
> 
> URL: http://gcc.gnu.org/viewcvs?rev=209633&root=gcc&view=rev
> Log:
> 2014-04-22  Richard Biener  <rguenther@suse.de>
> 
>     Backport from mainline
>     2014-04-14  Richard Biener  <rguenther@suse.de>
> 
>     PR middle-end/55022
>     * fold-const.c (negate_expr_p): Don't negate directional rounding
>     division.
>     (fold_negate_expr): Likewise.
> 
>     * gcc.dg/graphite/pr55022.c: New testcase.
> 
> Added:
>     branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/graphite/pr55022.c
> Modified:
>     branches/gcc-4_9-branch/gcc/ChangeLog
>     branches/gcc-4_9-branch/gcc/fold-const.c
>     branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
> 
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