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[Bug middle-end/43396] Very long compile time with -O1 -fgraphite-identity
- From: "spop at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 14 Jul 2013 06:12:11 +0000
- Subject: [Bug middle-end/43396] Very long compile time with -O1 -fgraphite-identity
- Auto-submitted: auto-generated
- References: <bug-43396-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43396
Sebastian Pop <spop at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Sebastian Pop <spop at gcc dot gnu.org> ---
On trunk, compile time on ARM exynos5 at 1.6GHz is:
$ cc1 -Os -fgraphite-identity t.c
Graphite loop transforms: 0.02 ( 1%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
7 kB ( 0%) ggc
Graphite code generation: 1.17 (84%) usr 0.02 (67%) sys 1.22 (81%) wall
164 kB ( 8%) ggc
TOTAL : 1.41 0.02 1.45
1943 kB
$ cc1 -O1 -fgraphite-identity t.c
TOTAL : 0.04 0.02 0.06
1653 kB
$ cc1 -O2 -fgraphite-identity t.c
Graphite loop transforms: 0.01 ( 3%) usr 0.00 ( 0%) sys 0.01 ( 3%) wall
8 kB ( 0%) ggc
Graphite code generation: 0.22 (69%) usr 0.00 ( 0%) sys 0.21 (60%) wall
47 kB ( 3%) ggc
TOTAL : 0.32 0.02 0.35
1783 kB
$ cc1 -O3 -fgraphite-identity t.c
Graphite loop transforms: 0.02 ( 6%) usr 0.00 ( 0%) sys 0.01 ( 3%) wall
8 kB ( 0%) ggc
Graphite code generation: 0.20 (61%) usr 0.00 ( 0%) sys 0.22 (56%) wall
47 kB ( 3%) ggc
TOTAL : 0.33 0.05 0.39
1810 kB