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[Bug middle-end/40965] [4.5 Regression][graphite] slow compilation
- From: "spop at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Aug 2009 21:03:08 -0000
- Subject: [Bug middle-end/40965] [4.5 Regression][graphite] slow compilation
- References: <bug-40965-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from spop at gcc dot gnu dot org 2009-08-25 21:03 -------
Disabling one of the useless gcc_asserts that verifies the consistency of the
original representation before any transform, I am down to 0 seconds for the
data dependence test, and the following compile times for graphite:
Graphite loop transforms: 2.60 (29%) usr 0.12 (60%) sys 2.69 (29%) wall
2365 kB ( 7%) ggc
Graphite code generation: 0.14 ( 2%) usr 0.00 ( 0%) sys 0.21 ( 2%) wall
157 kB ( 0%) ggc
TOTAL : 9.09 0.20 9.37
34582 kB
This is in the graphite branch, and so -O3 contains -floop-strip-mine and
-fgraphite-identity.
I also have tested with -floop-interchange and there is no more overhead.
I will test the patch in the graphite branch and then I will commit it to
trunk.
Sebastian
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40965