* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
@ 2023-06-14 21:28 ` pinskia at gcc dot gnu.org
2023-06-14 21:54 ` sjames at gcc dot gnu.org
` (9 subsequent siblings)
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From: pinskia at gcc dot gnu.org @ 2023-06-14 21:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=110237,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=109780,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=109093,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=109087,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=109982
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Could be multiple things really.
PR 109780, PR 109093, PR 109087 and PR 109982 are related to an aligment issue
with -march=znver* even.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
2023-06-14 21:28 ` [Bug target/110260] " pinskia at gcc dot gnu.org
@ 2023-06-14 21:54 ` sjames at gcc dot gnu.org
2023-06-15 6:32 ` rguenth at gcc dot gnu.org
` (8 subsequent siblings)
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From: sjames at gcc dot gnu.org @ 2023-06-14 21:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
Sam James <sjames at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sjames at gcc dot gnu.org
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
The case I've looked at the most is KWin (https://bugs.gentoo.org/895750) where
we narrowed it down to https://bugs.kde.org/show_bug.cgi?id=460572#c28 with:
"""
To emphasise:
- -O2 -march=x86-64-v3 works
- -O2 -march=x86-64-v4 (or -march=rocketlake) triggers it
"""
It may not be the same as Chiitoo's bug here, but it probably is given the
symptoms are the same & both likely involve AVX512.
I couldn't reproduce it on my machine with AVX512 (only one machine, Tiger
Lake) and couldn't really do any more at that point. I guess a good start would
be seeing what the minimal file(s) required to break kwin are w/ -march=znver4.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
2023-06-14 21:28 ` [Bug target/110260] " pinskia at gcc dot gnu.org
2023-06-14 21:54 ` sjames at gcc dot gnu.org
@ 2023-06-15 6:32 ` rguenth at gcc dot gnu.org
2023-06-15 7:01 ` amonakov at gcc dot gnu.org
` (7 subsequent siblings)
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From: rguenth at gcc dot gnu.org @ 2023-06-15 6:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you try if -fno-schedule-insns helps in (all?) cases?
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (2 preceding siblings ...)
2023-06-15 6:32 ` rguenth at gcc dot gnu.org
@ 2023-06-15 7:01 ` amonakov at gcc dot gnu.org
2023-06-15 7:04 ` rguenth at gcc dot gnu.org
` (6 subsequent siblings)
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From: amonakov at gcc dot gnu.org @ 2023-06-15 7:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Um, sched1 is not enabled on x86 so -fno-schedule-insns does nothing — you
probably meant -fno-schedule-insns2?
Another thing to try is -fstack-reuse=none, as indicated by comment #1.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (3 preceding siblings ...)
2023-06-15 7:01 ` amonakov at gcc dot gnu.org
@ 2023-06-15 7:04 ` rguenth at gcc dot gnu.org
2023-06-15 7:08 ` amonakov at gcc dot gnu.org
` (5 subsequent siblings)
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From: rguenth at gcc dot gnu.org @ 2023-06-15 7:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #4)
> Um, sched1 is not enabled on x86 so -fno-schedule-insns does nothing — you
> probably meant -fno-schedule-insns2?
Yes, of course - thanks for correcting me.
> Another thing to try is -fstack-reuse=none, as indicated by comment #1.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (4 preceding siblings ...)
2023-06-15 7:04 ` rguenth at gcc dot gnu.org
@ 2023-06-15 7:08 ` amonakov at gcc dot gnu.org
2023-06-15 9:53 ` [Bug target/110260] Multiple applications misbehave at runtime " chiitoo at gentoo dot org
` (4 subsequent siblings)
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From: amonakov at gcc dot gnu.org @ 2023-06-15 7:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Jimi Huotari from comment #0)
> (By the by, is ADCX a typo of ADX? I see -madx as an option but only one
> use of it otherwise, and no -adcx as an option and lots of mentions of it...
> but perhaps I'm not reading them correct-like.)
ADX is an x86 extension that adds two new instructions, ADCX and ADOX:
https://en.wikipedia.org/wiki/Intel_ADX
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave at runtime when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (5 preceding siblings ...)
2023-06-15 7:08 ` amonakov at gcc dot gnu.org
@ 2023-06-15 9:53 ` chiitoo at gentoo dot org
2023-06-15 11:17 ` chiitoo at gentoo dot org
` (3 subsequent siblings)
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From: chiitoo at gentoo dot org @ 2023-06-15 9:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
Jimi Huotari <chiitoo at gentoo dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Multiple applications |Multiple applications
|misbehave when compiled |misbehave at runtime when
|with -march=znver4 |compiled with -march=znver4
--- Comment #7 from Jimi Huotari <chiitoo at gentoo dot org> ---
(In reply to Alexander Monakov from comment #6)
> (In reply to Jimi Huotari from comment #0)
> > (By the by, is ADCX a typo of ADX? I see -madx as an option but only one
> > use of it otherwise, and no -adcx as an option and lots of mentions of it...
> > but perhaps I'm not reading them correct-like.)
>
> ADX is an x86 extension that adds two new instructions, ADCX and ADOX:
> https://en.wikipedia.org/wiki/Intel_ADX
Ah! Thank you.
(In reply to Alexander Monakov from comment #4)
> Um, sched1 is not enabled on x86 so -fno-schedule-insns does nothing — you
> probably meant -fno-schedule-insns2?
>
> Another thing to try is -fstack-reuse=none, as indicated by comment #1.
So far things look no different with either one or both of these set. I'll
test more as time permits, and see if I can find any better test-cases, and
will also look into those bug reports mentioned here.
In the initial report, being in a bit of a rush, I forgot to actually describe
the issues here (instead of just linking), so I'll do that here at least a bit.
KWin: This one show up so that I'm unable to move any window past the top and
left borders of the screen(s), and the also behave in a weird way when trying
to push them past them, and then resizing them, making the adjustment 'jump' a
lot at once. This also makes the LXQt panel behave in strange ways when set to
these locations; it will not animate automatic hiding of it, and it acts as if
it's always visible, even when hidden (so if clicking something below it, while
hiding, the click still goes onto the panel even if it's supposed to be
hiding).
Wine: There are issues with stack alignment leading to application crashes
triggered after a change made to the Wine code [1].
1.
https://source.winehq.org/git/wine.git/commitdiff/62173699c38453777c7d5638ed2e779790506b75
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave at runtime when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (6 preceding siblings ...)
2023-06-15 9:53 ` [Bug target/110260] Multiple applications misbehave at runtime " chiitoo at gentoo dot org
@ 2023-06-15 11:17 ` chiitoo at gentoo dot org
2023-06-15 18:06 ` zfigura at codeweavers dot com
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: chiitoo at gentoo dot org @ 2023-06-15 11:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #8 from Jimi Huotari <chiitoo at gentoo dot org> ---
Looks like with '-mno-avx512f' the issues go away for me.
As a sidey-note, this seems to also possibly affect KWin desktop effects
(animated ones at least), which don't seem to be doing their thing (haven't
been using them so had not noticed until trying now). Have not yet confirmed
that that is related though.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave at runtime when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (7 preceding siblings ...)
2023-06-15 11:17 ` chiitoo at gentoo dot org
@ 2023-06-15 18:06 ` zfigura at codeweavers dot com
2023-06-15 19:48 ` amonakov at gcc dot gnu.org
2023-06-15 21:55 ` zfigura at codeweavers dot com
10 siblings, 0 replies; 12+ messages in thread
From: zfigura at codeweavers dot com @ 2023-06-15 18:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
Zebediah Figura <zfigura at codeweavers dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zfigura at codeweavers dot com
--- Comment #9 from Zebediah Figura <zfigura at codeweavers dot com> ---
Wine developer here—FWIW, I think these may ultimately be separate issues.
The problem we were seeing with Wine is that, on the i386-w64-mingw32 target,
the stack alignment is supposed to be assumed to be only 4 (versus 16 on ELF or
x86_64 targets), and so any function using SSE/AVX instructions needs to
manually align the stack. In the cases where Wine was crashing, gcc was
generating vmovdqa instructions without actually aligning the stack first,
whereas without the -march=znver4 flag it apparently would align the stack and
then generate SSE movdqa.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave at runtime when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (8 preceding siblings ...)
2023-06-15 18:06 ` zfigura at codeweavers dot com
@ 2023-06-15 19:48 ` amonakov at gcc dot gnu.org
2023-06-15 21:55 ` zfigura at codeweavers dot com
10 siblings, 0 replies; 12+ messages in thread
From: amonakov at gcc dot gnu.org @ 2023-06-15 19:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #10 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Right, those are different issues. Any chance of a standalone testcase
extracted from Wine? If you already see a function where stack realignment is
missing, just give us preprocessed containing source, full gcc command line,
and output of 'gcc -v', as described on https://gcc.gnu.org/bugs/
(please open a new bug with that, and mention the new bug # here)
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/110260] Multiple applications misbehave at runtime when compiled with -march=znver4
2023-06-14 21:22 [Bug other/110260] New: Multiple applications misbehave when compiled with -march=znver4 chiitoo at gentoo dot org
` (9 preceding siblings ...)
2023-06-15 19:48 ` amonakov at gcc dot gnu.org
@ 2023-06-15 21:55 ` zfigura at codeweavers dot com
10 siblings, 0 replies; 12+ messages in thread
From: zfigura at codeweavers dot com @ 2023-06-15 21:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110260
--- Comment #11 from Zebediah Figura <zfigura at codeweavers dot com> ---
(In reply to Alexander Monakov from comment #10)
> Right, those are different issues. Any chance of a standalone testcase
> extracted from Wine? If you already see a function where stack realignment
> is missing, just give us preprocessed containing source, full gcc command
> line, and output of 'gcc -v', as described on https://gcc.gnu.org/bugs/
>
> (please open a new bug with that, and mention the new bug # here)
I've filed bug 110273 for the Wine misaligned stack problem.
^ permalink raw reply [flat|nested] 12+ messages in thread