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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 08:43:36 -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 #9 from rguenth at gcc dot gnu dot org 2006-03-24 08:43 -------
Ok, without -fno-tree-salias things are just worse, not different:
tree copy propagation : 134.88 ( 2%) usr 0.67 (10%) sys 136.04 ( 2%) wall
6573 kB ( 0%) ggc
tree store copy prop : 26.55 ( 0%) usr 0.01 ( 0%) sys 26.56 ( 0%) wall
1602 kB ( 0%) ggc
tree PHI insertion : 75.16 ( 1%) usr 1.80 (27%) sys 76.97 ( 1%) wall
1512507 kB (76%) ggc
tree SSA rewrite :6874.42 (89%) usr 0.20 ( 3%) sys6875.24 (89%) wall
22257 kB ( 1%) ggc
tree SSA incremental : 281.55 ( 4%) usr 0.11 ( 2%) sys 281.64 ( 4%) wall
10460 kB ( 1%) ggc
dominator optimization: 65.92 ( 1%) usr 0.03 ( 0%) sys 65.96 ( 1%) wall
20197 kB ( 1%) ggc
tree loop init : 30.19 ( 0%) usr 0.00 ( 0%) sys 30.20 ( 0%) wall
9 kB ( 0%) ggc
tree SSA uncprop : 28.22 ( 0%) usr 0.01 ( 0%) sys 28.22 ( 0%) wall
0 kB ( 0%) ggc
dominance frontiers : 21.44 ( 0%) usr 0.02 ( 0%) sys 21.40 ( 0%) wall
0 kB ( 0%) ggc
expand : 61.70 ( 1%) usr 0.07 ( 1%) sys 61.83 ( 1%) wall
49925 kB ( 3%) ggc
TOTAL :7709.86 6.60 7717.99
1990005 kB
(that was ia64 with 4.1.0, sorry)
I believe there's something wrong with the data-structures compared to what
we had in 4.0.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26830