* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
@ 2003-07-25 10:49 ` steven at gcc dot gnu dot org
2003-07-25 15:35 ` steven at gcc dot gnu dot org
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From: steven at gcc dot gnu dot org @ 2003-07-25 10:49 UTC (permalink / raw)
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------- Additional Comments From steven at gcc dot gnu dot org 2003-07-25 10:49 -------
This is still slow, but not as bad as it used to be. Here are time reports from
what I get on an Athlon XP2000 with 256MB RAM, for "g++-3.4 (GCC) 3.4 20030718
(experimental)":
$ g++-3.4 -c -ftime-report 2692.cc
Execution times (seconds)
cfg construction : 0.02 ( 2%) usr 0.00 ( 0%) sys 0.02 ( 2%) wall
trivially dead code : 0.01 ( 1%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
life analysis : 0.10 ( 9%) usr 0.00 ( 0%) sys 0.10 ( 8%) wall
life info update : 0.03 ( 3%) usr 0.00 ( 0%) sys 0.03 ( 3%) wall
register scan : 0.01 ( 1%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
parser : 0.12 (11%) usr 0.01 (17%) sys 0.14 (12%) wall
name lookup : 0.01 ( 1%) usr 0.02 (33%) sys 0.04 ( 3%) wall
expand : 0.09 ( 8%) usr 0.01 (17%) sys 0.10 ( 8%) wall
integration : 0.03 ( 3%) usr 0.00 ( 0%) sys 0.03 ( 3%) wall
flow analysis : 0.02 ( 2%) usr 0.00 ( 0%) sys 0.02 ( 2%) wall
local alloc : 0.11 (10%) usr 0.00 ( 0%) sys 0.11 ( 9%) wall
global alloc : 0.34 (31%) usr 0.00 ( 0%) sys 0.34 (29%) wall
flow 2 : 0.03 ( 3%) usr 0.00 ( 0%) sys 0.03 ( 3%) wall
shorten branches : 0.04 ( 4%) usr 0.00 ( 0%) sys 0.04 ( 3%) wall
reg stack : 0.01 ( 1%) usr 0.00 ( 0%) sys 0.01 ( 1%) wall
final : 0.06 ( 5%) usr 0.01 (17%) sys 0.07 ( 6%) wall
rest of compilation : 0.08 ( 7%) usr 0.01 (17%) sys 0.09 ( 8%) wall
TOTAL : 1.11 0.06 1.19
$ g++-3.4 -c -O -ftime-report 2692.cc
Execution times (seconds)
garbage collection : 0.17 ( 0%) usr 0.01 ( 3%) sys 0.68 ( 0%) wall
cfg construction : 0.11 ( 0%) usr 0.00 ( 0%) sys 0.11 ( 0%) wall
cfg cleanup : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.07 ( 0%) wall
trivially dead code : 0.13 ( 0%) usr 0.01 ( 3%) sys 0.14 ( 0%) wall
life analysis : 99.39 (67%) usr 0.06 (17%) sys 105.98 (66%) wall
life info update : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
alias analysis : 0.21 ( 0%) usr 0.01 ( 3%) sys 0.24 ( 0%) wall
register scan : 0.08 ( 0%) usr 0.01 ( 3%) sys 0.09 ( 0%) wall
rebuild jump labels : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.05 ( 0%) wall
preprocessing : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
parser : 0.12 ( 0%) usr 0.00 ( 0%) sys 0.13 ( 0%) wall
name lookup : 0.00 ( 0%) usr 0.03 ( 8%) sys 0.03 ( 0%) wall
expand : 0.52 ( 0%) usr 0.05 (14%) sys 0.60 ( 0%) wall
varconst : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
integration : 0.47 ( 0%) usr 0.01 ( 3%) sys 0.48 ( 0%) wall
jump : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
CSE : 2.65 ( 2%) usr 0.03 ( 8%) sys 3.05 ( 2%) wall
loop analysis : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
branch prediction : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
flow analysis : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
combiner : 6.36 ( 4%) usr 0.00 ( 0%) sys 6.79 ( 4%) wall
if-conversion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
local alloc : 0.33 ( 0%) usr 0.01 ( 3%) sys 0.48 ( 0%) wall
global alloc : 34.50 (23%) usr 0.11 (31%) sys 39.30 (24%) wall
reload CSE regs : 1.60 ( 1%) usr 0.00 ( 0%) sys 1.81 ( 1%) wall
flow 2 : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.07 ( 0%) wall
rename registers : 0.14 ( 0%) usr 0.00 ( 0%) sys 0.15 ( 0%) wall
shorten branches : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall
reg stack : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
final : 0.09 ( 0%) usr 0.01 ( 3%) sys 0.13 ( 0%) wall
rest of compilation : 0.31 ( 0%) usr 0.00 ( 0%) sys 0.32 ( 0%) wall
TOTAL : 147.62 0.36 161.10
So the expand hog is gone :-)
It's not a surprise that, for the test case for this PR, global alloc and life
analysis take so much time. It would obviously be nice to have it faster, but
it is not the awful compile time hog anymore.
Richard, I have not reconfirmed this PR because I am not sure what's reasonable
here. Do you think this report can be closed, or do you think these timings
still are unacceptable?
Gr.
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[not found] <20010429210601.2692.snyder@fnal.gov>
2003-07-25 10:49 ` [Bug optimization/2692] excessive compile time with optimization steven at gcc dot gnu dot org
@ 2003-07-25 15:35 ` steven at gcc dot gnu dot org
2003-07-25 16:56 ` steven at gcc dot gnu dot org
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------- Additional Comments From steven at gcc dot gnu dot org 2003-07-25 15:35 -------
Compiler:
GNU C++ version 3.4 20030725 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 3.4 20030725 (experimental).
GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=31916
Flags:
-O -quiet
File:
z.cc
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls ms/call ms/call name
10.73 40.70 40.70 19930 2.04 3.22 find_equiv_reg
9.68 77.41 36.71 193175759 0.00 0.00 find_base_term
9.53 113.58 36.17 178499488 0.00 0.00 refers_to_regno_p
8.26 144.90 31.32 446734067 0.00 0.00 canon_rtx
7.49 173.30 28.40 467218101 0.00 0.00 rtx_equal_p
7.20 200.62 27.32 176913679 0.00 0.00 read_dependence
6.26 224.38 23.75 73755132 0.00 0.00 addr_side_effect_eval
5.96 246.99 22.61 295299380 0.00 0.00 true_regnum
4.69 264.79 17.80 175470757 0.00 0.00 canon_true_dependence
4.38 281.39 16.61 578096780 0.00 0.00 ix86_find_base_term
4.36 297.94 16.54 178512386 0.00 0.00 reg_overlap_mentioned_p
4.11 313.51 15.58 578101529 0.00 0.00 i386_output_dwarf_dtprel
3.67 327.43 13.91 18646114 0.00 0.00 regno_clobbered_at_setjmp
2.38 336.45 9.02 176829268 0.00 0.00 main
1.29 341.36 4.91 175470757 0.00 0.00 anti_dependence
1.07 345.41 4.05 3014519 0.00 0.00 propagate_block
(all others <1%)
So find_equiv_reg is a bottleneck for this code.
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
2003-07-25 10:49 ` [Bug optimization/2692] excessive compile time with optimization steven at gcc dot gnu dot org
2003-07-25 15:35 ` steven at gcc dot gnu dot org
@ 2003-07-25 16:56 ` steven at gcc dot gnu dot org
2003-08-16 14:23 ` pinskia at gcc dot gnu dot org
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steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|0000-00-00 00:00:00 |2003-07-25 16:56:52
date| |
------- Additional Comments From steven at gcc dot gnu dot org 2003-07-25 16:56 -------
Bug 10776 may be related to this one.
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
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2003-07-25 16:56 ` steven at gcc dot gnu dot org
@ 2003-08-16 14:23 ` pinskia at gcc dot gnu dot org
2003-10-30 21:54 ` pinskia at gcc dot gnu dot org
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------- Additional Comments From pinskia at gcc dot gnu dot org 2003-08-16 14:23 -------
On powerpc-apple-darwin6.6, the combiner is where most of the work is done:
Execution times (seconds)
garbage collection : 1.12 ( 1%) usr 0.00 ( 0%) sys 2.16 ( 2%) wall
cfg construction : 0.18 ( 0%) usr 0.00 ( 0%) sys 0.57 ( 0%) wall
cfg cleanup : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
trivially dead code : 0.30 ( 0%) usr 0.00 ( 0%) sys 0.33 ( 0%) wall
life analysis : 9.04 ( 9%) usr 0.00 ( 0%) sys 10.26 ( 8%) wall
life info update : 0.28 ( 0%) usr 0.00 ( 0%) sys 0.32 ( 0%) wall
alias analysis : 0.42 ( 0%) usr 0.00 ( 0%) sys 0.45 ( 0%) wall
register scan : 0.25 ( 0%) usr 0.00 ( 0%) sys 0.35 ( 0%) wall
rebuild jump labels : 0.10 ( 0%) usr 0.00 ( 0%) sys 0.12 ( 0%) wall
preprocessing : 0.13 ( 0%) usr 0.00 ( 0%) sys 0.20 ( 0%) wall
parser : 0.54 ( 1%) usr 0.00 ( 0%) sys 0.54 ( 0%) wall
name lookup : 0.66 ( 1%) usr 0.00 ( 0%) sys 0.73 ( 1%) wall
expand : 1.28 ( 1%) usr 0.00 ( 0%) sys 2.42 ( 2%) wall
integration : 1.10 ( 1%) usr 0.00 ( 0%) sys 3.75 ( 3%) wall
jump : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.09 ( 0%) wall
CSE : 5.04 ( 5%) usr 0.00 ( 0%) sys 6.21 ( 5%) wall
loop analysis : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
branch prediction : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.23 ( 0%) wall
flow analysis : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
combiner : 63.88 (66%) usr 0.00 ( 0%) sys 82.54 (65%) wall
if-conversion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
local alloc : 1.04 ( 1%) usr 0.00 ( 0%) sys 1.96 ( 2%) wall
global alloc : 5.34 ( 6%) usr 0.00 ( 0%) sys 6.33 ( 5%) wall
reload CSE regs : 3.57 ( 4%) usr 0.00 ( 0%) sys 4.07 ( 3%) wall
flow 2 : 0.15 ( 0%) usr 0.00 ( 0%) sys 0.15 ( 0%) wall
rename registers : 0.24 ( 0%) usr 0.00 ( 0%) sys 0.28 ( 0%) wall
shorten branches : 0.11 ( 0%) usr 0.00 ( 0%) sys 0.11 ( 0%) wall
final : 0.35 ( 0%) usr 0.00 ( 0%) sys 0.41 ( 0%) wall
rest of compilation : 0.71 ( 1%) usr 0.00 ( 0%) sys 1.76 ( 1%) wall
TOTAL : 96.15 0.00 126.51
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2003-08-16 14:23 ` pinskia at gcc dot gnu dot org
@ 2003-10-30 21:54 ` pinskia at gcc dot gnu dot org
2003-11-23 8:24 ` pinskia at gcc dot gnu dot org
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------- Additional Comments From pinskia at gcc dot gnu dot org 2003-10-30 21:22 -------
On the mainline (20031030), this code with -O3, gcc ICEs on powerpc-apple-darwin in
the webizer pass.
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2003-10-30 21:54 ` pinskia at gcc dot gnu dot org
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------- Additional Comments From pinskia at gcc dot gnu dot org 2003-11-23 08:24 -------
It is cool that -O3 and -O2 are faster than -O1 (unit-at-a-time causes this)
The time has migrated to rename (for -O3 at least) registers on the mainline:
-O3 -fno-web:
Execution times (seconds)
garbage collection : 1.78 ( 2%) usr 0.01 ( 0%) sys 2.76 ( 2%) wall
callgraph construction: 0.09 ( 0%) usr 0.02 ( 1%) sys 0.34 ( 0%) wall
cfg construction : 0.15 ( 0%) usr 0.00 ( 0%) sys 0.19 ( 0%) wall
cfg cleanup : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
trivially dead code : 0.34 ( 0%) usr 0.02 ( 1%) sys 0.70 ( 1%) wall
life analysis : 2.81 ( 3%) usr 0.00 ( 0%) sys 3.02 ( 3%) wall
life info update : 1.07 ( 1%) usr 0.02 ( 1%) sys 1.30 ( 1%) wall
alias analysis : 0.45 ( 0%) usr 0.05 ( 2%) sys 0.71 ( 1%) wall
register scan : 0.28 ( 0%) usr 0.00 ( 0%) sys 0.33 ( 0%) wall
rebuild jump labels : 0.10 ( 0%) usr 0.00 ( 0%) sys 0.13 ( 0%) wall
preprocessing : 0.05 ( 0%) usr 0.04 ( 2%) sys 0.15 ( 0%) wall
parser : 0.65 ( 1%) usr 0.20 ( 9%) sys 1.54 ( 1%) wall
name lookup : 0.16 ( 0%) usr 0.44 (19%) sys 0.65 ( 1%) wall
expand : 0.91 ( 1%) usr 0.12 ( 5%) sys 3.07 ( 3%) wall
integration : 1.11 ( 1%) usr 0.09 ( 4%) sys 1.55 ( 1%) wall
jump : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.09 ( 0%) wall
CSE : 3.09 ( 3%) usr 0.07 ( 3%) sys 3.85 ( 3%) wall
loop analysis : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
CSE 2 : 0.92 ( 1%) usr 0.02 ( 1%) sys 1.02 ( 1%) wall
branch prediction : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
flow analysis : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
combiner : 15.43 (16%) usr 0.13 ( 6%) sys 18.74 (16%) wall
if-conversion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
regmove : 0.40 ( 0%) usr 0.01 ( 0%) sys 0.41 ( 0%) wall
scheduling : 8.13 ( 8%) usr 0.46 (20%) sys 9.42 ( 8%) wall
local alloc : 1.21 ( 1%) usr 0.02 ( 1%) sys 1.30 ( 1%) wall
global alloc : 2.52 ( 3%) usr 0.08 ( 3%) sys 2.72 ( 2%) wall
reload CSE regs : 0.94 ( 1%) usr 0.00 ( 0%) sys 0.97 ( 1%) wall
flow 2 : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.05 ( 0%) wall
rename registers : 51.52 (53%) usr 0.07 ( 3%) sys 56.65 (48%) wall
scheduling 2 : 1.63 ( 2%) usr 0.39 (17%) sys 4.27 ( 4%) wall
shorten branches : 0.09 ( 0%) usr 0.01 ( 0%) sys 0.12 ( 0%) wall
final : 0.19 ( 0%) usr 0.02 ( 1%) sys 0.22 ( 0%) wall
rest of compilation : 0.45 ( 0%) usr 0.01 ( 0%) sys 0.50 ( 0%) wall
TOTAL : 96.78 2.33 116.99
-O0:
Execution times (seconds)
garbage collection : 0.13 ( 3%) usr 0.00 ( 0%) sys 0.14 ( 2%) wall
cfg construction : 0.04 ( 1%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
trivially dead code : 0.03 ( 1%) usr 0.00 ( 0%) sys 0.07 ( 1%) wall
life analysis : 0.41 (10%) usr 0.00 ( 0%) sys 0.50 ( 8%) wall
life info update : 0.21 ( 5%) usr 0.00 ( 0%) sys 0.23 ( 4%) wall
register scan : 0.05 ( 1%) usr 0.00 ( 0%) sys 0.05 ( 1%) wall
rebuild jump labels : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 1%) wall
preprocessing : 0.04 ( 1%) usr 0.07 ( 9%) sys 0.11 ( 2%) wall
parser : 0.68 (16%) usr 0.18 (22%) sys 0.78 (12%) wall
name lookup : 0.19 ( 5%) usr 0.45 (56%) sys 0.78 (12%) wall
expand : 0.22 ( 5%) usr 0.00 ( 0%) sys 0.26 ( 4%) wall
integration : 0.08 ( 2%) usr 0.00 ( 0%) sys 0.09 ( 1%) wall
jump : 0.00 ( 0%) usr 0.01 ( 1%) sys 0.00 ( 0%) wall
flow analysis : 0.04 ( 1%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
local alloc : 0.73 (18%) usr 0.02 ( 3%) sys 1.21 (19%) wall
global alloc : 0.76 (18%) usr 0.02 ( 3%) sys 1.11 (18%) wall
flow 2 : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
shorten branches : 0.07 ( 2%) usr 0.00 ( 0%) sys 0.07 ( 1%) wall
final : 0.17 ( 4%) usr 0.01 ( 1%) sys 0.35 ( 6%) wall
rest of compilation : 0.24 ( 6%) usr 0.00 ( 0%) sys 0.35 ( 6%) wall
TOTAL : 4.15 0.80 6.25
-O1:
Execution times (seconds)
garbage collection : 1.23 ( 1%) usr 0.00 ( 0%) sys 1.28 ( 1%) wall
cfg construction : 0.13 ( 0%) usr 0.00 ( 0%) sys 0.13 ( 0%) wall
cfg cleanup : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
trivially dead code : 0.32 ( 0%) usr 0.01 ( 1%) sys 0.30 ( 0%) wall
life analysis : 3.45 ( 3%) usr 0.02 ( 1%) sys 4.09 ( 4%) wall
life info update : 1.02 ( 1%) usr 0.00 ( 0%) sys 1.05 ( 1%) wall
alias analysis : 0.41 ( 0%) usr 0.04 ( 3%) sys 0.47 ( 0%) wall
register scan : 0.25 ( 0%) usr 0.00 ( 0%) sys 0.28 ( 0%) wall
rebuild jump labels : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall
preprocessing : 0.05 ( 0%) usr 0.07 ( 5%) sys 0.16 ( 0%) wall
parser : 0.61 ( 1%) usr 0.18 (13%) sys 0.75 ( 1%) wall
name lookup : 0.37 ( 0%) usr 0.34 (25%) sys 0.76 ( 1%) wall
expand : 0.66 ( 1%) usr 0.08 ( 6%) sys 0.74 ( 1%) wall
integration : 1.02 ( 1%) usr 0.02 ( 1%) sys 1.07 ( 1%) wall
jump : 0.04 ( 0%) usr 0.01 ( 1%) sys 0.03 ( 0%) wall
CSE : 3.27 ( 3%) usr 0.03 ( 2%) sys 3.39 ( 3%) wall
loop analysis : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
branch prediction : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
flow analysis : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
combiner : 81.10 (79%) usr 0.20 (15%) sys 83.87 (77%) wall
if-conversion : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
local alloc : 1.62 ( 2%) usr 0.05 ( 4%) sys 1.67 ( 2%) wall
global alloc : 3.68 ( 4%) usr 0.23 (17%) sys 4.02 ( 4%) wall
reload CSE regs : 1.37 ( 1%) usr 0.01 ( 1%) sys 1.94 ( 2%) wall
flow 2 : 0.09 ( 0%) usr 0.00 ( 0%) sys 0.20 ( 0%) wall
rename registers : 0.47 ( 0%) usr 0.00 ( 0%) sys 0.60 ( 1%) wall
shorten branches : 0.17 ( 0%) usr 0.02 ( 1%) sys 0.23 ( 0%) wall
final : 0.43 ( 0%) usr 0.01 ( 1%) sys 0.61 ( 1%) wall
rest of compilation : 0.75 ( 1%) usr 0.02 ( 1%) sys 0.80 ( 1%) wall
TOTAL : 102.71 1.37 108.74
-O2:
Execution times (seconds)
garbage collection : 1.69 ( 4%) usr 0.00 ( 0%) sys 2.63 ( 4%) wall
callgraph construction: 0.08 ( 0%) usr 0.02 ( 1%) sys 0.11 ( 0%) wall
callgraph optimization: 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
cfg construction : 0.13 ( 0%) usr 0.00 ( 0%) sys 0.13 ( 0%) wall
cfg cleanup : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
trivially dead code : 0.34 ( 1%) usr 0.01 ( 0%) sys 0.38 ( 1%) wall
life analysis : 2.88 ( 6%) usr 0.03 ( 1%) sys 3.48 ( 6%) wall
life info update : 0.97 ( 2%) usr 0.00 ( 0%) sys 1.09 ( 2%) wall
alias analysis : 0.44 ( 1%) usr 0.07 ( 3%) sys 0.75 ( 1%) wall
register scan : 0.24 ( 1%) usr 0.01 ( 0%) sys 0.25 ( 0%) wall
rebuild jump labels : 0.10 ( 0%) usr 0.00 ( 0%) sys 0.12 ( 0%) wall
preprocessing : 0.07 ( 0%) usr 0.08 ( 4%) sys 0.13 ( 0%) wall
parser : 0.55 ( 1%) usr 0.14 ( 6%) sys 0.82 ( 1%) wall
name lookup : 0.27 ( 1%) usr 0.43 (19%) sys 0.63 ( 1%) wall
expand : 0.73 ( 2%) usr 0.05 ( 2%) sys 0.81 ( 1%) wall
integration : 1.04 ( 2%) usr 0.14 ( 6%) sys 1.24 ( 2%) wall
jump : 0.08 ( 0%) usr 0.02 ( 1%) sys 0.08 ( 0%) wall
CSE : 3.13 ( 7%) usr 0.06 ( 3%) sys 4.16 ( 7%) wall
loop analysis : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
CSE 2 : 0.89 ( 2%) usr 0.02 ( 1%) sys 0.99 ( 2%) wall
branch prediction : 0.03 ( 0%) usr 0.01 ( 0%) sys 0.04 ( 0%) wall
flow analysis : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
combiner : 15.77 (35%) usr 0.11 ( 5%) sys 18.25 (31%) wall
if-conversion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
regmove : 0.40 ( 1%) usr 0.00 ( 0%) sys 0.48 ( 1%) wall
scheduling : 8.15 (18%) usr 0.47 (21%) sys 9.75 (16%) wall
local alloc : 1.28 ( 3%) usr 0.02 ( 1%) sys 1.44 ( 2%) wall
global alloc : 2.46 ( 5%) usr 0.10 ( 4%) sys 3.05 ( 5%) wall
reload CSE regs : 0.96 ( 2%) usr 0.02 ( 1%) sys 1.17 ( 2%) wall
flow 2 : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.05 ( 0%) wall
rename registers : 0.21 ( 0%) usr 0.00 ( 0%) sys 0.55 ( 1%) wall
scheduling 2 : 1.32 ( 3%) usr 0.41 (18%) sys 5.31 ( 9%) wall
shorten branches : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.09 ( 0%) wall
final : 0.22 ( 0%) usr 0.02 ( 1%) sys 0.89 ( 1%) wall
rest of compilation : 0.46 ( 1%) usr 0.00 ( 0%) sys 0.52 ( 1%) wall
TOTAL : 45.16 2.24 59.57
-O1 -funit-at-a-time:
Execution times (seconds)
garbage collection : 1.18 ( 4%) usr 0.00 ( 0%) sys 1.22 ( 4%) wall
callgraph construction: 0.10 ( 0%) usr 0.01 ( 1%) sys 0.10 ( 0%) wall
cfg construction : 0.11 ( 0%) usr 0.00 ( 0%) sys 0.12 ( 0%) wall
cfg cleanup : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
trivially dead code : 0.22 ( 1%) usr 0.00 ( 0%) sys 0.21 ( 1%) wall
life analysis : 2.70 ( 9%) usr 0.02 ( 2%) sys 2.75 ( 8%) wall
life info update : 0.54 ( 2%) usr 0.00 ( 0%) sys 0.56 ( 2%) wall
alias analysis : 0.27 ( 1%) usr 0.01 ( 1%) sys 0.31 ( 1%) wall
register scan : 0.17 ( 1%) usr 0.00 ( 0%) sys 0.17 ( 1%) wall
rebuild jump labels : 0.07 ( 0%) usr 0.00 ( 0%) sys 0.07 ( 0%) wall
preprocessing : 0.01 ( 0%) usr 0.12 (11%) sys 0.12 ( 0%) wall
parser : 0.51 ( 2%) usr 0.15 (14%) sys 0.81 ( 2%) wall
name lookup : 0.34 ( 1%) usr 0.38 (35%) sys 0.70 ( 2%) wall
expand : 0.71 ( 2%) usr 0.07 ( 6%) sys 0.78 ( 2%) wall
integration : 1.11 ( 4%) usr 0.08 ( 7%) sys 1.21 ( 4%) wall
jump : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
CSE : 2.00 ( 6%) usr 0.05 ( 5%) sys 2.09 ( 6%) wall
loop analysis : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
branch prediction : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
flow analysis : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall
combiner : 17.04 (54%) usr 0.07 ( 6%) sys 17.57 (53%) wall
local alloc : 0.75 ( 2%) usr 0.03 ( 3%) sys 0.80 ( 2%) wall
global alloc : 1.80 ( 6%) usr 0.04 ( 4%) sys 1.89 ( 6%) wall
reload CSE regs : 0.47 ( 2%) usr 0.00 ( 0%) sys 0.49 ( 1%) wall
flow 2 : 0.05 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall
rename registers : 0.23 ( 1%) usr 0.00 ( 0%) sys 0.23 ( 1%) wall
shorten branches : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall
final : 0.18 ( 1%) usr 0.02 ( 2%) sys 0.21 ( 1%) wall
rest of compilation : 0.47 ( 2%) usr 0.01 ( 1%) sys 0.47 ( 1%) wall
TOTAL : 31.27 1.09 33.21
-O0 -funit-at-a-time:
Execution times (seconds)
garbage collection : 0.14 ( 3%) usr 0.00 ( 0%) sys 0.14 ( 2%) wall
callgraph construction: 0.10 ( 2%) usr 0.00 ( 0%) sys 0.11 ( 2%) wall
cfg construction : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
trivially dead code : 0.03 ( 1%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
life analysis : 0.42 (10%) usr 0.01 ( 1%) sys 1.09 (15%) wall
life info update : 0.21 ( 5%) usr 0.00 ( 0%) sys 0.23 ( 3%) wall
register scan : 0.05 ( 1%) usr 0.01 ( 1%) sys 0.04 ( 1%) wall
rebuild jump labels : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 1%) wall
preprocessing : 0.07 ( 2%) usr 0.06 ( 9%) sys 0.09 ( 1%) wall
parser : 0.64 (15%) usr 0.15 (22%) sys 0.80 (11%) wall
name lookup : 0.25 ( 6%) usr 0.36 (54%) sys 0.71 (10%) wall
expand : 0.22 ( 5%) usr 0.01 ( 1%) sys 0.24 ( 3%) wall
integration : 0.07 ( 2%) usr 0.01 ( 1%) sys 0.07 ( 1%) wall
jump : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
flow analysis : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall
local alloc : 0.74 (17%) usr 0.01 ( 1%) sys 0.80 (11%) wall
global alloc : 0.74 (17%) usr 0.02 ( 3%) sys 1.25 (17%) wall
flow 2 : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
shorten branches : 0.07 ( 2%) usr 0.00 ( 0%) sys 0.08 ( 1%) wall
final : 0.20 ( 5%) usr 0.00 ( 0%) sys 1.01 (14%) wall
rest of compilation : 0.29 ( 7%) usr 0.00 ( 0%) sys 0.31 ( 4%) wall
TOTAL : 4.37 0.67 7.16
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
` (5 preceding siblings ...)
2003-11-23 8:24 ` pinskia at gcc dot gnu dot org
@ 2004-01-15 1:16 ` rth at gcc dot gnu dot org
2004-04-29 2:40 ` pinskia at gcc dot gnu dot org
` (3 subsequent siblings)
10 siblings, 0 replies; 11+ messages in thread
From: rth at gcc dot gnu dot org @ 2004-01-15 1:16 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2004-01-15 01:16 -------
Current state on mainline, at least for x86 at -O2, is that we spend lots
of time in flow doing dead store elimination,
life analysis : 60.94 (76%) usr 0.00 ( 0%) sys 61.02 (75%) wall
TOTAL : 80.58 0.39 81.01
If I tweek flow.c to not do *any* store elimination at all, I can pull
the total down to ~75 seconds. I don't see anything easy to do to even
bridge the gap between these two times at this late stage of 3.4.
On tree-ssa branch, we do significantly better.
TOTAL : 18.08 0.51 18.57
This with the original C++ test case. If I crop the std::dcomplex parts
and use the _Complex support in C, then I get
TOTAL : 5.85 0.17 6.01
Clearly there's work to do yet in unraveling the abstraction, but either
compilation time is acceptable, so I'm going to suspend this PR as fixed
pending merge to mainline.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |SUSPENDED
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
` (6 preceding siblings ...)
2004-01-15 1:16 ` rth at gcc dot gnu dot org
@ 2004-04-29 2:40 ` pinskia at gcc dot gnu dot org
2004-04-29 3:27 ` giovannibajo at libero dot it
` (2 subsequent siblings)
10 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-29 2:40 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-29 01:05 -------
With my cast pass we cut the time in half of the current tree-ssa compiler. It also
improves the code too.
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2003-07-25 16:56:52 |2004-04-29 01:05:52
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
` (7 preceding siblings ...)
2004-04-29 2:40 ` pinskia at gcc dot gnu dot org
@ 2004-04-29 3:27 ` giovannibajo at libero dot it
2004-04-29 6:11 ` pinskia at gcc dot gnu dot org
2004-05-13 21:33 ` [Bug tree-optimization/2692] " pinskia at gcc dot gnu dot org
10 siblings, 0 replies; 11+ messages in thread
From: giovannibajo at libero dot it @ 2004-04-29 3:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-04-29 01:34 -------
The C vs C++ difference can probably be tracked in a new different (cleaner) PR.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |giovannibajo at libero dot
| |it
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
` (8 preceding siblings ...)
2004-04-29 3:27 ` giovannibajo at libero dot it
@ 2004-04-29 6:11 ` pinskia at gcc dot gnu dot org
2004-05-13 21:33 ` [Bug tree-optimization/2692] " pinskia at gcc dot gnu dot org
10 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-29 6:11 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-29 03:29 -------
I filed a bug which should help the code generation differences between C and C++, PR 15197.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug tree-optimization/2692] excessive compile time with optimization
[not found] <20010429210601.2692.snyder@fnal.gov>
` (9 preceding siblings ...)
2004-04-29 6:11 ` pinskia at gcc dot gnu dot org
@ 2004-05-13 21:33 ` pinskia at gcc dot gnu dot org
10 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-13 21:33 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-13 11:50 -------
Fixed for 3.5.0 by the merge of the tree-ssa.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
Component|rtl-optimization |tree-optimization
Resolution| |FIXED
Target Milestone|tree-ssa |3.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2692
^ permalink raw reply [flat|nested] 11+ messages in thread