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* [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster
[not found] <bug-41115-4@http.gcc.gnu.org/bugzilla/>
@ 2012-07-13 8:37 ` rguenth at gcc dot gnu.org
2012-11-13 18:44 ` ubizjak at gmail dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-13 8:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41115
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |53947
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-13 08:37:32 UTC ---
Link to vectorizer missed-optimization meta-bug.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster
[not found] <bug-41115-4@http.gcc.gnu.org/bugzilla/>
2012-07-13 8:37 ` [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster rguenth at gcc dot gnu.org
@ 2012-11-13 18:44 ` ubizjak at gmail dot com
2013-03-27 12:38 ` rguenth at gcc dot gnu.org
2013-03-28 23:08 ` burnus at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: ubizjak at gmail dot com @ 2012-11-13 18:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41115
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |venkataramanan.kumar at amd
| |dot com
--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2012-11-13 18:44:22 UTC ---
Adding CC.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster
[not found] <bug-41115-4@http.gcc.gnu.org/bugzilla/>
2012-07-13 8:37 ` [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster rguenth at gcc dot gnu.org
2012-11-13 18:44 ` ubizjak at gmail dot com
@ 2013-03-27 12:38 ` rguenth at gcc dot gnu.org
2013-03-28 23:08 ` burnus at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-03-27 12:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41115
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-27 12:38:05 UTC ---
It would be nice to see where we are today with respect to the cost model /
vectorizing / not vectorizing.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster
[not found] <bug-41115-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2013-03-27 12:38 ` rguenth at gcc dot gnu.org
@ 2013-03-28 23:08 ` burnus at gcc dot gnu.org
3 siblings, 0 replies; 4+ messages in thread
From: burnus at gcc dot gnu.org @ 2013-03-28 23:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41115
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |burnus at gcc dot gnu.org
--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> 2013-03-28 23:08:00 UTC ---
(In reply to comment #3)
> It would be nice to see where we are today with respect to the cost model /
> vectorizing / not vectorizing.
Answer: It became much worse (compared to GCC 4.5 of comment 0):
Using gcc version 4.8.0 20130308 [trunk revision 196547], the induct runtimes
are:
gfortran -march=native -ffast-math -O3 -ftree-vectorize -fvect-cost-model
induct.f90
real 0m47.142s / user 0m47.072s / sys 0m0.020s
gfortran-4.8 -march=native -ffast-math -O3 -ftree-vectorize
-fno-vect-cost-model induct.f90
real 0m35.713s / user 0m35.236s / sys 0m0.052s
time gfortran-4.8 -march=native -ffast-math -O3 -fno-tree-vectorize induct.f90
real 0m47.837s / user 0m47.388s / sys 0m0.028s
real 0m47.514s / user 0m47.428s / sys 0m0.044s
gfortran -march=opteron -ffast-math -funroll-loops -fno-tree-vectorize
-ftree-loop-linear -msse3 -O3 induct.f90
real 0m44.676s / user 0m44.640s / sys 0m0.032s
gfortran-4.5 -march=opteron -ffast-math -funroll-loops -fno-tree-vectorize
-ftree-loop-linear -msse3 -O3 induct.f90; time ./a.out
real 0m34.591s / user 0m34.524s / sys 0m0.020s
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-03-28 23:08 UTC | newest]
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[not found] <bug-41115-4@http.gcc.gnu.org/bugzilla/>
2012-07-13 8:37 ` [Bug middle-end/41115] Tree-vectorizer: VecCost tuning for X2: Without vectorization 30% faster rguenth at gcc dot gnu.org
2012-11-13 18:44 ` ubizjak at gmail dot com
2013-03-27 12:38 ` rguenth at gcc dot gnu.org
2013-03-28 23:08 ` burnus at gcc dot gnu.org
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