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[Bug tree-optimization/26830] [4.1/4.2 Regression] Insane amount of compile-time / memory needed at -O1 and above
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Mar 2006 16:26:52 -0000
- Subject: [Bug tree-optimization/26830] [4.1/4.2 Regression] Insane amount of compile-time / memory needed at -O1 and above
- References: <bug-26830-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #16 from rguenth at gcc dot gnu dot org 2006-03-24 16:26 -------
With -O1 -fno-tree-ch we get (on ia64 again):
tree copy propagation : 132.88 (22%) usr 0.07 ( 1%) sys 132.94 (22%) wall
5037 kB ( 0%) ggc
tree store copy prop : 27.43 ( 5%) usr 0.01 ( 0%) sys 27.44 ( 5%) wall
1090 kB ( 0%) ggc
tree PHI insertion : 79.40 (13%) usr 1.74 (31%) sys 81.14 (13%) wall
1512507 kB (77%) ggc
tree SSA rewrite : 94.23 (16%) usr 0.09 ( 2%) sys 94.32 (16%) wall
22257 kB ( 1%) ggc
dominator optimization: 66.17 (11%) usr 0.07 ( 1%) sys 66.24 (11%) wall
18901 kB ( 1%) ggc
tree loop init : 29.35 ( 5%) usr 0.00 ( 0%) sys 29.35 ( 5%) wall
9 kB ( 0%) ggc
tree SSA uncprop : 27.61 ( 5%) usr 0.00 ( 0%) sys 27.61 ( 5%) wall
0 kB ( 0%) ggc
expand : 31.99 ( 5%) usr 0.04 ( 1%) sys 32.04 ( 5%) wall
49360 kB ( 3%) ggc
TOTAL : 599.15 5.55 604.92
1964166 kB
so, much more mixed results, but tree copy propagation now being the worst
offender.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26830