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* [Bug debug/105559] New: -g and -O3 cause timeout
@ 2022-05-11 10:16 dcb314 at hotmail dot com
2022-05-11 10:31 ` [Bug c/105559] " dcb314 at hotmail dot com
` (13 more replies)
0 siblings, 14 replies; 15+ messages in thread
From: dcb314 at hotmail dot com @ 2022-05-11 10:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Bug ID: 105559
Summary: -g and -O3 cause timeout
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 52952
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52952&action=edit
C source code
For the attached C code, flags -g and -O3 cause a timeout:
$ time /home/dcb/gcc/results/bin/gcc -w -c -O3 bug809.i
real 0m0.656s
user 0m0.587s
sys 0m0.032s
$ (ulimit -t 300; time /home/dcb/gcc/results/bin/gcc -w -c -g -O3 bug809.i)
gcc: fatal error: Killed signal terminated program cc1
compilation terminated.
real 5m14.868s
user 4m57.685s
sys 0m2.265s
$ (ulimit -t 300; time /home/dcb/gcc/results/bin/gcc -w -c -g -O2 bug809.i)
real 0m0.732s
user 0m0.683s
sys 0m0.024s
$ /home/dcb/gcc/results/bin/gcc -v 2>&1 | fgrep exp
gcc version 13.0.0 20220510 (experimental) (60ab3d0f2d9f9504)
$
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c/105559] -g and -O3 cause timeout
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
@ 2022-05-11 10:31 ` dcb314 at hotmail dot com
2022-05-11 10:41 ` [Bug c/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875 marxin at gcc dot gnu.org
` (12 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: dcb314 at hotmail dot com @ 2022-05-11 10:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|debug |c
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
The problem seems to exist since sometime before git revision 82a4c5c704433249,
dated about a month ago.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
2022-05-11 10:31 ` [Bug c/105559] " dcb314 at hotmail dot com
@ 2022-05-11 10:41 ` marxin at gcc dot gnu.org
2022-05-11 11:06 ` rguenth at gcc dot gnu.org
` (11 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-05-11 10:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2022-05-11
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Summary|-g and -O3 cause timeout |[12/13 Regression] -g and
| |-O3 cause timeout since
| |r12-156-g8d4c374c4419a875
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r12-156-g8d4c374c4419a875.
I see purge_dead_edges in perf top after some time dominating.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug c/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
2022-05-11 10:31 ` [Bug c/105559] " dcb314 at hotmail dot com
2022-05-11 10:41 ` [Bug c/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875 marxin at gcc dot gnu.org
@ 2022-05-11 11:06 ` rguenth at gcc dot gnu.org
2022-05-11 11:34 ` [Bug rtl-optimization/105559] " rguenth at gcc dot gnu.org
` (10 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-11 11:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Target Milestone|--- |12.2
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will investigate but definitely the cited revision isn't the culprit but
maybe the exposer.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (2 preceding siblings ...)
2022-05-11 11:06 ` rguenth at gcc dot gnu.org
@ 2022-05-11 11:34 ` rguenth at gcc dot gnu.org
2022-05-11 11:40 ` rguenth at gcc dot gnu.org
` (9 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-11 11:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog
Component|c |rtl-optimization
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
stuck in RTL jump pass btw, calling delete_trivially_dead_insns at the start
of its invocation (_not_ during the jump threading iteration).
We have a block with very many DEBUG_INSN at end and delete_insn_and_edges
does
/* Like delete_insn but also purge dead edges from BB.
Return true if any edges are eliminated. */
bool
delete_insn_and_edges (rtx_insn *insn)
{
bool purge = false;
if (INSN_P (insn) && BLOCK_FOR_INSN (insn))
{
basic_block bb = BLOCK_FOR_INSN (insn);
if (BB_END (bb) == insn)
purge = true;
else if (DEBUG_INSN_P (BB_END (bb)))
for (rtx_insn *dinsn = NEXT_INSN (insn);
DEBUG_INSN_P (dinsn); dinsn = NEXT_INSN (dinsn))
if (BB_END (bb) == dinsn)
{
purge = true;
break;
}
}
delete_insn (insn);
if (purge)
return purge_dead_edges (BLOCK_FOR_INSN (insn));
that's highly inefficient when insn is a debug insn itself. Fixing that
alone doesn't seem to be enough to make it "fast" but at least it
finishes in 20s for me then with no obvious peak.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (3 preceding siblings ...)
2022-05-11 11:34 ` [Bug rtl-optimization/105559] " rguenth at gcc dot gnu.org
@ 2022-05-11 11:40 ` rguenth at gcc dot gnu.org
2022-05-11 12:34 ` cvs-commit at gcc dot gnu.org
` (8 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-11 11:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |94618
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Latent on all active branches btw., caused by r10-7769-gc41884a09206be
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94618
[Bug 94618] [8/9 Regression] '-fcompare-debug' failure (length) with -O2
-fnon-call-exceptions since r8-565-g7581ce9a1ad6df9c
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (4 preceding siblings ...)
2022-05-11 11:40 ` rguenth at gcc dot gnu.org
@ 2022-05-11 12:34 ` cvs-commit at gcc dot gnu.org
2022-05-11 12:59 ` [Bug rtl-optimization/105559] [9/10/11/12 " rguenth at gcc dot gnu.org
` (7 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-11 12:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:37a8220fa9188470c677abfef50c1b120c0b6c76
commit r13-323-g37a8220fa9188470c677abfef50c1b120c0b6c76
Author: Richard Biener <rguenther@suse.de>
Date: Wed May 11 13:34:37 2022 +0200
rtl-optimization/105559 - avoid quadratic behavior in delete_insn_and_edges
When the insn to delete is a debug insn there's no point in figuring
out whether it might be the last real insn and thus we have to purge
dead edges.
2022-05-11 Richard Biener <rguenther@suse.de>
PR rtl-optimization/105559
* cfgrtl.cc (delete_insn_and_edges): Only perform search to BB_END
for non-debug insns.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [9/10/11/12 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (5 preceding siblings ...)
2022-05-11 12:34 ` cvs-commit at gcc dot gnu.org
@ 2022-05-11 12:59 ` rguenth at gcc dot gnu.org
2022-05-11 15:46 ` dcb314 at hotmail dot com
` (6 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-11 12:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |13.0
Priority|P3 |P2
Summary|[12/13 Regression] -g and |[9/10/11/12 Regression] -g
|-O3 cause timeout since |and -O3 cause timeout since
|r12-156-g8d4c374c4419a875 |r12-156-g8d4c374c4419a875
Target Milestone|12.2 |9.5
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [9/10/11/12 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (6 preceding siblings ...)
2022-05-11 12:59 ` [Bug rtl-optimization/105559] [9/10/11/12 " rguenth at gcc dot gnu.org
@ 2022-05-11 15:46 ` dcb314 at hotmail dot com
2022-05-12 6:47 ` rguenther at suse dot de
` (5 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: dcb314 at hotmail dot com @ 2022-05-11 15:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #7 from David Binderman <dcb314 at hotmail dot com> ---
Thanks for the fast work. Less than 2.5 hours from reported to fixed
for a bug that hadn't been found for a couple of years.
I should also mention that this bug was produced from code produced by csmith,
a most excellent C source code generator program.
There is a school of thought that says running csmith regularly over the gcc
trunk
will find bugs.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [9/10/11/12 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (7 preceding siblings ...)
2022-05-11 15:46 ` dcb314 at hotmail dot com
@ 2022-05-12 6:47 ` rguenther at suse dot de
2022-05-19 12:47 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenther at suse dot de @ 2022-05-12 6:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 11 May 2022, dcb314 at hotmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
>
> --- Comment #7 from David Binderman <dcb314 at hotmail dot com> ---
> Thanks for the fast work. Less than 2.5 hours from reported to fixed
> for a bug that hadn't been found for a couple of years.
>
> I should also mention that this bug was produced from code produced by csmith,
> a most excellent C source code generator program.
>
> There is a school of thought that says running csmith regularly over the gcc
> trunk
> will find bugs.
Yep, and that's very much appreciated!
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [9/10/11/12 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (8 preceding siblings ...)
2022-05-12 6:47 ` rguenther at suse dot de
@ 2022-05-19 12:47 ` cvs-commit at gcc dot gnu.org
2022-05-19 14:03 ` [Bug rtl-optimization/105559] [9/10/11 " cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-19 12:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:2a040e982945a5795081e81be35094b604d596d3
commit r12-8399-g2a040e982945a5795081e81be35094b604d596d3
Author: Richard Biener <rguenther@suse.de>
Date: Wed May 11 13:34:37 2022 +0200
rtl-optimization/105559 - avoid quadratic behavior in delete_insn_and_edges
When the insn to delete is a debug insn there's no point in figuring
out whether it might be the last real insn and thus we have to purge
dead edges.
2022-05-11 Richard Biener <rguenther@suse.de>
PR rtl-optimization/105559
* cfgrtl.cc (delete_insn_and_edges): Only perform search to BB_END
for non-debug insns.
(cherry picked from commit 37a8220fa9188470c677abfef50c1b120c0b6c76)
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [9/10/11 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (9 preceding siblings ...)
2022-05-19 12:47 ` cvs-commit at gcc dot gnu.org
@ 2022-05-19 14:03 ` cvs-commit at gcc dot gnu.org
2022-05-27 9:48 ` [Bug rtl-optimization/105559] [10 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-19 14:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:d293946d5c318549af88f96c4c2175dcbb8f4cf1
commit r11-10021-gd293946d5c318549af88f96c4c2175dcbb8f4cf1
Author: Richard Biener <rguenther@suse.de>
Date: Wed May 11 13:34:37 2022 +0200
rtl-optimization/105559 - avoid quadratic behavior in delete_insn_and_edges
When the insn to delete is a debug insn there's no point in figuring
out whether it might be the last real insn and thus we have to purge
dead edges.
2022-05-11 Richard Biener <rguenther@suse.de>
PR rtl-optimization/105559
* cfgrtl.c (delete_insn_and_edges): Only perform search to BB_END
for non-debug insns.
(cherry picked from commit 37a8220fa9188470c677abfef50c1b120c0b6c76)
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [10 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (10 preceding siblings ...)
2022-05-19 14:03 ` [Bug rtl-optimization/105559] [9/10/11 " cvs-commit at gcc dot gnu.org
@ 2022-05-27 9:48 ` rguenth at gcc dot gnu.org
2022-05-27 13:15 ` cvs-commit at gcc dot gnu.org
2022-05-27 13:15 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 9:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [10 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (11 preceding siblings ...)
2022-05-27 9:48 ` [Bug rtl-optimization/105559] [10 " rguenth at gcc dot gnu.org
@ 2022-05-27 13:15 ` cvs-commit at gcc dot gnu.org
2022-05-27 13:15 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-27 13:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:6007449a1c3bd116e431fe53d4dfe2d1c67c1076
commit r10-10763-g6007449a1c3bd116e431fe53d4dfe2d1c67c1076
Author: Richard Biener <rguenther@suse.de>
Date: Wed May 11 13:34:37 2022 +0200
rtl-optimization/105559 - avoid quadratic behavior in delete_insn_and_edges
When the insn to delete is a debug insn there's no point in figuring
out whether it might be the last real insn and thus we have to purge
dead edges.
2022-05-11 Richard Biener <rguenther@suse.de>
PR rtl-optimization/105559
* cfgrtl.c (delete_insn_and_edges): Only perform search to BB_END
for non-debug insns.
(cherry picked from commit 37a8220fa9188470c677abfef50c1b120c0b6c76)
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug rtl-optimization/105559] [10 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875
2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
` (12 preceding siblings ...)
2022-05-27 13:15 ` cvs-commit at gcc dot gnu.org
@ 2022-05-27 13:15 ` rguenth at gcc dot gnu.org
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 13:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105559
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |10.3.0
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
Known to work| |10.3.1
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2022-05-27 13:15 UTC | newest]
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2022-05-11 10:16 [Bug debug/105559] New: -g and -O3 cause timeout dcb314 at hotmail dot com
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2022-05-11 10:41 ` [Bug c/105559] [12/13 Regression] -g and -O3 cause timeout since r12-156-g8d4c374c4419a875 marxin at gcc dot gnu.org
2022-05-11 11:06 ` rguenth at gcc dot gnu.org
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