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* [Bug rtl-optimization/52000] New: cross-jumping drops MEM attributes even when it makes no changes to the code @ 2012-01-25 19:29 rsandifo at gcc dot gnu.org 2012-01-25 19:44 ` [Bug rtl-optimization/52000] " pinskia at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: rsandifo at gcc dot gnu.org @ 2012-01-25 19:29 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52000 Bug #: 52000 Summary: cross-jumping drops MEM attributes even when it makes no changes to the code Classification: Unclassified Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassigned@gcc.gnu.org ReportedBy: rsandifo@gcc.gnu.org flow_find_cross_jump calls merge_memattrs for each pair of instructions that it was thinking of merging, regardless of whether the merge takes place. This can cause mem attributes to be dropped unnecessarily. See: http://gcc.gnu.org/ml/gcc/2012-01/msg00015.html for more discussion and context. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52000] cross-jumping drops MEM attributes even when it makes no changes to the code 2012-01-25 19:29 [Bug rtl-optimization/52000] New: cross-jumping drops MEM attributes even when it makes no changes to the code rsandifo at gcc dot gnu.org @ 2012-01-25 19:44 ` pinskia at gcc dot gnu.org 2012-01-26 13:25 ` rguenth at gcc dot gnu.org 2021-12-18 23:15 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2012-01-25 19:44 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52000 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-01-25 Ever Confirmed|0 |1 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-25 19:20:48 UTC --- Confirmed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52000] cross-jumping drops MEM attributes even when it makes no changes to the code 2012-01-25 19:29 [Bug rtl-optimization/52000] New: cross-jumping drops MEM attributes even when it makes no changes to the code rsandifo at gcc dot gnu.org 2012-01-25 19:44 ` [Bug rtl-optimization/52000] " pinskia at gcc dot gnu.org @ 2012-01-26 13:25 ` rguenth at gcc dot gnu.org 2021-12-18 23:15 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2012-01-26 13:25 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52000 --- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-26 11:21:33 UTC --- It also calls merge_notes (so I suppose might drop REG_EQUAL notes). Both should be delayed to commit time. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52000] cross-jumping drops MEM attributes even when it makes no changes to the code 2012-01-25 19:29 [Bug rtl-optimization/52000] New: cross-jumping drops MEM attributes even when it makes no changes to the code rsandifo at gcc dot gnu.org 2012-01-25 19:44 ` [Bug rtl-optimization/52000] " pinskia at gcc dot gnu.org 2012-01-26 13:25 ` rguenth at gcc dot gnu.org @ 2021-12-18 23:15 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-12-18 23:15 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52000 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-12-18 23:15 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-01-25 19:29 [Bug rtl-optimization/52000] New: cross-jumping drops MEM attributes even when it makes no changes to the code rsandifo at gcc dot gnu.org 2012-01-25 19:44 ` [Bug rtl-optimization/52000] " pinskia at gcc dot gnu.org 2012-01-26 13:25 ` rguenth at gcc dot gnu.org 2021-12-18 23:15 ` pinskia at gcc dot gnu.org
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