[Bug middle-end/31767] New: 25% slowdown in gas_dyn since 2007-04-27

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Using the Polyhedron test suite, I get a slowdown of gas_dyn from 11.62s
(2007-04-26, r124174) to 14.70 (since 2007-04-27, r124211).

The same can also be observed at
http://www.suse.de/~gcctest/c++bench/polyhedron/
http://www.suse.de/~gcctest/c++bench/polyhedron/polyhedron-summary.txt-gas_dyn-17.png

Both systems are x86-64/Linux systems.

If you don't have the polyhedron test, you can obtain it from:
http://www.polyhedron.com/pb05/polyhedron_benchmark_suite.html

The test was run with the parameters:

gfortran -march=opteron -ffast-math -funroll-loops -ftree-vectorize
-ftree-loop-linear -msse3 -O3 gas_dyn.f90


-- 
           Summary: 25% slowdown in gas_dyn since 2007-04-27
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31767