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* [Bug middle-end/49946] New: Thread jumps confuse loop unrolling
@ 2011-08-02 14:41 izamyatin at gmail dot com
2011-08-03 15:27 ` [Bug middle-end/49946] " izamyatin at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: izamyatin at gmail dot com @ 2011-08-02 14:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
Summary: Thread jumps confuse loop unrolling
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: izamyatin@gmail.com
Created attachment 24892
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24892
test for loop unrolling
I see exactly the case that was mentioned here -
http://gcc.gnu.org/ml/gcc/2010-01/msg00057.html:
exp_gcc/gcc -c -O3 test_unroll.c -fno-tree-dominator-opts performs complete
unroll and
exp_gcc/gcc -c -O3 test_unroll.c does not do the unroll
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/49946] Thread jumps confuse loop unrolling
2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
@ 2011-08-03 15:27 ` izamyatin at gmail dot com
2011-08-08 11:35 ` izamyatin at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: izamyatin at gmail dot com @ 2011-08-03 15:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
--- Comment #1 from Igor Zamyatin <izamyatin at gmail dot com> 2011-08-03 15:26:57 UTC ---
Used compiler:
Target: x86_64-unknown-linux-gnu
Thread model: posix
gcc version 4.7.0 20110802 (experimental) (GCC)
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/49946] Thread jumps confuse loop unrolling
2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
2011-08-03 15:27 ` [Bug middle-end/49946] " izamyatin at gmail dot com
@ 2011-08-08 11:35 ` izamyatin at gmail dot com
2021-11-29 6:34 ` [Bug tree-optimization/49946] " pinskia at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: izamyatin at gmail dot com @ 2011-08-08 11:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
--- Comment #2 from Igor Zamyatin <izamyatin at gmail dot com> 2011-08-08 11:35:32 UTC ---
cunrolli does not handle the loop in the testcase because of the condition "ul
== UL_NO_GROWTH && unr_insns > ninsns" in try_unroll_loop_completely. Meanwhile
may_increase_size is true in tree_unroll_loops_completely.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/49946] Thread jumps confuse loop unrolling
2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
2011-08-03 15:27 ` [Bug middle-end/49946] " izamyatin at gmail dot com
2011-08-08 11:35 ` izamyatin at gmail dot com
@ 2021-11-29 6:34 ` pinskia at gcc dot gnu.org
2021-12-09 9:30 ` marxin at gcc dot gnu.org
2024-03-17 1:20 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-11-29 6:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
Last reconfirmed| |2021-11-29
Component|middle-end |tree-optimization
Ever confirmed|0 |1
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, though it looks like it was fixed on the trunk.
There has been a "few" jump threading patches which would have improved this
situation.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/49946] Thread jumps confuse loop unrolling
2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
` (2 preceding siblings ...)
2021-11-29 6:34 ` [Bug tree-optimization/49946] " pinskia at gcc dot gnu.org
@ 2021-12-09 9:30 ` marxin at gcc dot gnu.org
2024-03-17 1:20 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-12-09 9:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aldyh at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to fail| |11.2.0
Known to work| |12.0
Keywords|needs-bisection |
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed with r12-2591-g2e96b5f14e402569.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/49946] Thread jumps confuse loop unrolling
2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
` (3 preceding siblings ...)
2021-12-09 9:30 ` marxin at gcc dot gnu.org
@ 2024-03-17 1:20 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-03-17 1:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49946
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |12.0
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2024-03-17 1:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2011-08-02 14:41 [Bug middle-end/49946] New: Thread jumps confuse loop unrolling izamyatin at gmail dot com
2011-08-03 15:27 ` [Bug middle-end/49946] " izamyatin at gmail dot com
2011-08-08 11:35 ` izamyatin at gmail dot com
2021-11-29 6:34 ` [Bug tree-optimization/49946] " pinskia at gcc dot gnu.org
2021-12-09 9:30 ` marxin at gcc dot gnu.org
2024-03-17 1:20 ` pinskia at gcc dot gnu.org
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