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* [Bug rtl-optimization/57812] New: Waste work in computed_jump_p()
@ 2013-07-03 19:13 pchang9 at cs dot wisc.edu
2013-07-03 20:27 ` [Bug rtl-optimization/57812] Wasted " pchang9 at cs dot wisc.edu
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: pchang9 at cs dot wisc.edu @ 2013-07-03 19:13 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57812
Bug ID: 57812
Summary: Waste work in computed_jump_p()
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pchang9 at cs dot wisc.edu
CC: nistor1 at illinois dot edu
The problem appears in revision 200588 in version 4.9.
In method "computed_jump_p()" in gcc/rtlanal.c, the loop on line 2801 should
break immediately after "has_use_labelref" is set to "1". All the iterations
after "has_use_labelref" set to "1" do not perform any useful work, at best
they just set "has_use_labelref" again to "1".
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug rtl-optimization/57812] Wasted work in computed_jump_p() 2013-07-03 19:13 [Bug rtl-optimization/57812] New: Waste work in computed_jump_p() pchang9 at cs dot wisc.edu @ 2013-07-03 20:27 ` pchang9 at cs dot wisc.edu 2013-07-03 20:39 ` pchang9 at cs dot wisc.edu ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pchang9 at cs dot wisc.edu @ 2013-07-03 20:27 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57812 --- Comment #1 from Po-Chun Chang <pchang9 at cs dot wisc.edu> --- Created attachment 30441 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30441&action=edit Suggested patch ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57812] Wasted work in computed_jump_p() 2013-07-03 19:13 [Bug rtl-optimization/57812] New: Waste work in computed_jump_p() pchang9 at cs dot wisc.edu 2013-07-03 20:27 ` [Bug rtl-optimization/57812] Wasted " pchang9 at cs dot wisc.edu @ 2013-07-03 20:39 ` pchang9 at cs dot wisc.edu 2013-07-22 16:50 ` pchang9 at cs dot wisc.edu 2021-09-12 21:35 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pchang9 at cs dot wisc.edu @ 2013-07-03 20:39 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57812 --- Comment #2 from Po-Chun Chang <pchang9 at cs dot wisc.edu> --- Created attachment 30443 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30443&action=edit Suggested patch ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57812] Wasted work in computed_jump_p() 2013-07-03 19:13 [Bug rtl-optimization/57812] New: Waste work in computed_jump_p() pchang9 at cs dot wisc.edu 2013-07-03 20:27 ` [Bug rtl-optimization/57812] Wasted " pchang9 at cs dot wisc.edu 2013-07-03 20:39 ` pchang9 at cs dot wisc.edu @ 2013-07-22 16:50 ` pchang9 at cs dot wisc.edu 2021-09-12 21:35 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pchang9 at cs dot wisc.edu @ 2013-07-22 16:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57812 --- Comment #3 from Po-Chun Chang <pchang9 at cs dot wisc.edu> --- Patch sent to gcc-patches@ http://gcc.gnu.org/ml/gcc-patches/2013-07/msg00931.html ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/57812] Wasted work in computed_jump_p() 2013-07-03 19:13 [Bug rtl-optimization/57812] New: Waste work in computed_jump_p() pchang9 at cs dot wisc.edu ` (2 preceding siblings ...) 2013-07-22 16:50 ` pchang9 at cs dot wisc.edu @ 2021-09-12 21:35 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2021-09-12 21:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57812 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|UNCONFIRMED |RESOLVED Target Milestone|--- |4.9.0 Keywords| |compile-time-hog --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Patch was committed at r0-124417 so fixed. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-09-12 21:35 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-07-03 19:13 [Bug rtl-optimization/57812] New: Waste work in computed_jump_p() pchang9 at cs dot wisc.edu 2013-07-03 20:27 ` [Bug rtl-optimization/57812] Wasted " pchang9 at cs dot wisc.edu 2013-07-03 20:39 ` pchang9 at cs dot wisc.edu 2013-07-22 16:50 ` pchang9 at cs dot wisc.edu 2021-09-12 21:35 ` pinskia at gcc dot gnu.org
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