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* [Bug tree-optimization/23902] New: update_ssa very very very slow
@ 2005-09-15 20:58 dberlin at gcc dot gnu dot org
2005-09-15 21:05 ` [Bug tree-optimization/23902] " dnovillo at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: dberlin at gcc dot gnu dot org @ 2005-09-15 20:58 UTC (permalink / raw)
To: gcc-bugs
For 20001226-1.c at -O3, i get:
Execution times (seconds)
tree VRP : 11.32 (10%) usr 0.08 ( 9%) sys 11.68 (10%) wall
3194 kB ( 8%) ggc
tree operand scan : 28.39 (26%) usr 0.17 (18%) sys 29.00 (25%) wall
2722 kB ( 7%) dominance frontiers : 35.35 (32%) usr 0.13 (14%) sys 36.18
(31%) wall 0 kB ( 0%) ggc
TOTAL : 110.77 0.92 116.23
38719 kB
gprof shows that all but one of the calls to compute dominance frontiers come
from update_ssa (probably because people are using TODO_update_ssa instead of
TODO_update_ssa_no_phi).
The operand scan time is also mostly update_ssa, checking for modified statements
--
Summary: update_ssa very very very slow
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dberlin at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23902
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/23902] update_ssa very very very slow
2005-09-15 20:58 [Bug tree-optimization/23902] New: update_ssa very very very slow dberlin at gcc dot gnu dot org
@ 2005-09-15 21:05 ` dnovillo at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: dnovillo at gcc dot gnu dot org @ 2005-09-15 21:05 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |dnovillo at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-09-15 21:04:42
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23902
^ permalink raw reply [flat|nested] 2+ messages in thread
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2005-09-15 20:58 [Bug tree-optimization/23902] New: update_ssa very very very slow dberlin at gcc dot gnu dot org
2005-09-15 21:05 ` [Bug tree-optimization/23902] " dnovillo at gcc dot gnu dot org
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