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* [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> @ 2010-10-01 12:07 ` jakub at gcc dot gnu.org 2011-02-20 15:24 ` steven at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2010-10-01 12:07 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.4.5 |4.4.6 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> 2010-10-01 12:07 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark jakub at gcc dot gnu.org @ 2011-02-20 15:24 ` steven at gcc dot gnu.org 2011-02-20 16:03 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: steven at gcc dot gnu.org @ 2011-02-20 15:24 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 Steven Bosscher <steven at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |WAITING CC| |dje at gcc dot gnu.org, | |steven at gcc dot gnu.org --- Comment #13 from Steven Bosscher <steven at gcc dot gnu.org> 2011-02-20 15:20:37 UTC --- Ping? No reconfirmation, no progress, no movement of _any_ kind for two years. Can anyone tell whether there is still a regression here? ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> 2010-10-01 12:07 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark jakub at gcc dot gnu.org 2011-02-20 15:24 ` steven at gcc dot gnu.org @ 2011-02-20 16:03 ` rguenth at gcc dot gnu.org 2011-04-16 11:13 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6/4.7 " jakub at gcc dot gnu.org 2011-09-11 12:06 ` steven at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2011-02-20 16:03 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 --- Comment #14 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-20 15:41:32 UTC --- It would also be interesting if with profile-feedback and/or LTO this particular problem vanishes, given that both should result in better static branch predictions. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/37534] [4.4/4.5/4.6/4.7 Regression] IRA causes 17% degradation in 187.facerec benchmark [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> ` (2 preceding siblings ...) 2011-02-20 16:03 ` rguenth at gcc dot gnu.org @ 2011-04-16 11:13 ` jakub at gcc dot gnu.org 2011-09-11 12:06 ` steven at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2011-04-16 11:13 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.4.6 |4.4.7 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/37534] [4.4/4.5/4.6/4.7 Regression] IRA causes 17% degradation in 187.facerec benchmark [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> ` (3 preceding siblings ...) 2011-04-16 11:13 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6/4.7 " jakub at gcc dot gnu.org @ 2011-09-11 12:06 ` steven at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: steven at gcc dot gnu.org @ 2011-09-11 12:06 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 Steven Bosscher <steven at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution| |INVALID --- Comment #15 from Steven Bosscher <steven at gcc dot gnu.org> 2011-09-11 10:44:09 UTC --- No response to request for update for >6 months => closing. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/37534] New: [4.4 Regression] IRA causes 17% degradation in 187.facerec benchmark @ 2008-09-15 23:45 luisgpm at linux dot vnet dot ibm dot com 2010-04-30 8:56 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org 0 siblings, 1 reply; 6+ messages in thread From: luisgpm at linux dot vnet dot ibm dot com @ 2008-09-15 23:45 UTC (permalink / raw) To: gcc-bugs A degradation of ~17% occured in SPEC2000's ppc64 187.facerec benchmark right after the IRA patch went in (revision 139590 - http://gcc.gnu.org/viewcvs?view=rev&revision=139590). The attached code is as far as i could go without removing all the bad instruction sequences and yet making it smaller than the whole function. While the code generated by r139589 has 174 load instructions and 59 store instructions, the one generated by r139590 hs 215 loads and 103 stores. A difference of about 40 instructions for each. If we look into the complete function, the difference jumps to about 250 more load/store instructions. The logs show that r139590 has more spills than r139589. -- Summary: [4.4 Regression] IRA causes 17% degradation in 187.facerec benchmark Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: luisgpm at linux dot vnet dot ibm dot com GCC build triplet: powerpc64-linux GCC host triplet: powerpc64-linux GCC target triplet: powerpc64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark 2008-09-15 23:45 [Bug tree-optimization/37534] New: [4.4 " luisgpm at linux dot vnet dot ibm dot com @ 2010-04-30 8:56 ` jakub at gcc dot gnu dot org 0 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu dot org @ 2010-04-30 8:56 UTC (permalink / raw) To: gcc-bugs -- jakub at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|4.4.4 |4.4.5 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37534 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-09-11 10:44 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <bug-37534-4@http.gcc.gnu.org/bugzilla/> 2010-10-01 12:07 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 Regression] IRA causes 17% degradation in 187.facerec benchmark jakub at gcc dot gnu.org 2011-02-20 15:24 ` steven at gcc dot gnu.org 2011-02-20 16:03 ` rguenth at gcc dot gnu.org 2011-04-16 11:13 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6/4.7 " jakub at gcc dot gnu.org 2011-09-11 12:06 ` steven at gcc dot gnu.org 2008-09-15 23:45 [Bug tree-optimization/37534] New: [4.4 " luisgpm at linux dot vnet dot ibm dot com 2010-04-30 8:56 ` [Bug rtl-optimization/37534] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org
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