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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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