This is the mail archive of the
fortran@gcc.gnu.org
mailing list for the GNU Fortran project.
induct regression in gcc 4.3.1
- From: Jack Howarth <howarth at bromo dot msbb dot uc dot edu>
- To: fortran at gcc dot gnu dot org
- Date: Fri, 20 Jun 2008 20:01:41 -0400
- Subject: induct regression in gcc 4.3.1
It appears that the performance regression which
I found in the induct polyhedron benchmark in gcc 4.3.1 is
triggered by the use of -ffast-math. Benchmarking induct
compiled with gcc 4.2.4 and 4.3.1 shows....
gcc 4.2.4 gcc 4.3.1
Ave Run Ave Run
-O3 73.57 71.71
-ffast-math -O3 68.27 89.76
This is on i686-apple-darwin9.
Jack