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[Bug middle-end/38846] [Graphite] 70% slower using -floop* than without graphite (gas_dyn of Polyhedron)
- From: "burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 Jan 2009 21:16:37 -0000
- Subject: [Bug middle-end/38846] [Graphite] 70% slower using -floop* than without graphite (gas_dyn of Polyhedron)
- References: <bug-38846-13404@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from burnus at gcc dot gnu dot org 2009-01-14 21:16 -------
> Thanks for this report. Please also test with the code of graphite
> branch that contains a patch that schedules several scalar optimizations
> that can improve the quality of the code generated.
For the geometric mean I see a 1% improvement over trunk+graphite. gas_dyn is
now 18.70s. However, capacita is slower on the branch (only 4% instead of 6%
faster than the trunk w/o graphite); channel is 2% slower on the branch than
trunk's graphite. Except of these two, the branch is faster. (Though the load
of other programs might be also a bit less than for the trunk run [w/ and w/o
-floop*].)
Thanks for your Graphite work!
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38846