[Bug fortran/60549] [4.9 Regression] Run time doubled for fatigue.f90 due to SAVE changes

dominiq at lps dot ens.fr gcc-bugzilla@gcc.gnu.org
Mon Mar 17 09:18:00 GMT 2014


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60549

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-03-17
                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Since r208590, the execution time of Polyhedron's fatigue.f90 doubled 
> from ~1.4s to ~2.9s.

To make the things clear, these timings were obtained after applying the patch
at

http://gcc.gnu.org/ml/gcc-patches/2014-03/msg00754.html

I have a few very short (invalid) tests which are optimized differently before
and after r208590. I can post some of them if there is an interest.



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