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[Bug rtl-optimization/13987] [3.4/3.5 Regression] compile time regression while compile fold-const.i
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 May 2004 22:48:10 -0000
- Subject: [Bug rtl-optimization/13987] [3.4/3.5 Regression] compile time regression while compile fold-const.i
- References: <20040203013908.13987.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-17 22:48 -------
Here are the numbers after the tree-ssa was merged into the mainline (it is faster but still
slower than 3.3.3):
[zhivago:~/src/testspeed] pinskia% time ~/fsf-clean-nocheck/bin/gcc -O3 fold-const.i -
ftime-report -S
Execution times (seconds)
garbage collection : 3.74 ( 4%) usr 0.01 ( 0%) sys 3.91 ( 3%) wall
callgraph construction: 0.45 ( 1%) usr 0.02 ( 0%) sys 0.48 ( 0%) wall
cfg construction : 0.23 ( 0%) usr 0.06 ( 1%) sys 0.28 ( 0%) wall
cfg cleanup : 0.72 ( 1%) usr 0.01 ( 0%) sys 0.77 ( 1%) wall
trivially dead code : 1.47 ( 2%) usr 0.00 ( 0%) sys 1.52 ( 1%) wall
life analysis : 1.70 ( 2%) usr 0.36 ( 3%) sys 2.23 ( 2%) wall
life info update : 2.04 ( 2%) usr 0.02 ( 0%) sys 2.11 ( 2%) wall
alias analysis : 2.07 ( 2%) usr 0.04 ( 0%) sys 2.01 ( 2%) wall
register scan : 0.95 ( 1%) usr 0.01 ( 0%) sys 1.02 ( 1%) wall
rebuild jump labels : 0.31 ( 0%) usr 0.00 ( 0%) sys 0.31 ( 0%) wall
preprocessing : 0.62 ( 1%) usr 1.17 (10%) sys 1.74 ( 1%) wall
lexical analysis : 1.16 ( 1%) usr 1.99 (18%) sys 3.27 ( 3%) wall
parser : 1.31 ( 2%) usr 1.12 (10%) sys 2.70 ( 2%) wall
integration : 0.19 ( 0%) usr 0.00 ( 0%) sys 0.22 ( 0%) wall
tree gimplify : 0.85 ( 1%) usr 0.07 ( 1%) sys 0.96 ( 1%) wall
tree eh : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
tree CFG construction : 0.09 ( 0%) usr 0.03 ( 0%) sys 0.15 ( 0%) wall
tree CFG cleanup : 0.52 ( 1%) usr 0.01 ( 0%) sys 0.51 ( 0%) wall
tree PTA : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.07 ( 0%) wall
tree alias analysis : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
tree PHI insertion : 0.18 ( 0%) usr 0.04 ( 0%) sys 0.26 ( 0%) wall
tree SSA rewrite : 0.40 ( 0%) usr 0.01 ( 0%) sys 0.45 ( 0%) wall
tree SSA other : 1.11 ( 1%) usr 0.40 ( 4%) sys 1.75 ( 2%) wall
tree operand scan : 0.69 ( 1%) usr 0.58 ( 5%) sys 1.06 ( 1%) wall
dominator optimization: 4.23 ( 5%) usr 0.26 ( 2%) sys 4.68 ( 4%) wall
tree CCP : 0.08 ( 0%) usr 0.01 ( 0%) sys 0.15 ( 0%) wall
tree split crit edges : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
tree PRE : 2.06 ( 2%) usr 0.04 ( 0%) sys 2.12 ( 2%) wall
tree forward propagate: 0.08 ( 0%) usr 0.00 ( 0%) sys 0.13 ( 0%) wall
tree conservative DCE : 0.19 ( 0%) usr 0.00 ( 0%) sys 0.22 ( 0%) wall
tree aggressive DCE : 0.09 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
tree DSE : 0.15 ( 0%) usr 0.03 ( 0%) sys 0.17 ( 0%) wall
tree copy headers : 0.27 ( 0%) usr 0.02 ( 0%) sys 0.23 ( 0%) wall
tree SSA to normal : 0.26 ( 0%) usr 0.03 ( 0%) sys 0.35 ( 0%) wall
tree rename SSA copies: 0.06 ( 0%) usr 0.02 ( 0%) sys 0.05 ( 0%) wall
dominance frontiers : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.10 ( 0%) wall
control dependences : 0.01 ( 0%) usr 0.03 ( 0%) sys 0.06 ( 0%) wall
expand : 3.31 ( 4%) usr 0.04 ( 0%) sys 3.64 ( 3%) wall
varconst : 0.03 ( 0%) usr 0.01 ( 0%) sys 0.01 ( 0%) wall
jump : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.17 ( 0%) wall
CSE : 3.51 ( 4%) usr 0.00 ( 0%) sys 3.67 ( 3%) wall
global CSE : 13.25 (15%) usr 1.63 (15%) sys 30.48 (26%) wall
loop analysis : 0.48 ( 1%) usr 0.05 ( 0%) sys 0.49 ( 0%) wall
bypass jumps : 0.69 ( 1%) usr 0.18 ( 2%) sys 0.91 ( 1%) wall
CSE 2 : 1.74 ( 2%) usr 0.01 ( 0%) sys 1.81 ( 2%) wall
branch prediction : 0.61 ( 1%) usr 0.09 ( 1%) sys 0.79 ( 1%) wall
flow analysis : 0.09 ( 0%) usr 0.01 ( 0%) sys 0.13 ( 0%) wall
combiner : 4.80 ( 6%) usr 0.11 ( 1%) sys 5.04 ( 4%) wall
if-conversion : 0.19 ( 0%) usr 0.04 ( 0%) sys 0.24 ( 0%) wall
regmove : 0.34 ( 0%) usr 0.00 ( 0%) sys 0.39 ( 0%) wall
scheduling : 6.59 ( 8%) usr 1.79 (16%) sys 8.95 ( 8%) wall
local alloc : 14.06 (16%) usr 0.10 ( 1%) sys 14.50 (12%) wall
global alloc : 2.11 ( 2%) usr 0.25 ( 2%) sys 2.60 ( 2%) wall
reload CSE regs : 1.50 ( 2%) usr 0.01 ( 0%) sys 1.57 ( 1%) wall
flow 2 : 0.13 ( 0%) usr 0.05 ( 0%) sys 0.23 ( 0%) wall
if-conversion 2 : 0.07 ( 0%) usr 0.06 ( 1%) sys 0.13 ( 0%) wall
peephole 2 : 0.19 ( 0%) usr 0.00 ( 0%) sys 0.12 ( 0%) wall
rename registers : 0.31 ( 0%) usr 0.06 ( 1%) sys 0.36 ( 0%) wall
scheduling 2 : 0.91 ( 1%) usr 0.03 ( 0%) sys 1.05 ( 1%) wall
reorder blocks : 0.16 ( 0%) usr 0.00 ( 0%) sys 0.20 ( 0%) wall
shorten branches : 0.20 ( 0%) usr 0.00 ( 0%) sys 0.24 ( 0%) wall
final : 0.50 ( 1%) usr 0.03 ( 0%) sys 0.57 ( 0%) wall
symout : 0.02 ( 0%) usr 0.02 ( 0%) sys 0.05 ( 0%) wall
rest of compilation : 1.09 ( 1%) usr 0.14 ( 1%) sys 1.06 ( 1%) wall
TOTAL : 85.55 11.17 116.57
85.560u 11.240s 1:57.87 82.1% 0+0k 2+7io 0pf+0w
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2004-02-03 02:40:46 |2004-05-17 22:48:10
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13987