* [Bug ipa/101354] [11/12 regression] naked function mishandled - store optimized away
2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
@ 2021-07-06 22:36 ` pinskia at gcc dot gnu.org
2021-07-07 6:48 ` rguenth at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2021-07-06 22:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL|https://godbolt.org/z/4T4x8 |
|eb4f |
Keywords| |wrong-code
Component|inline-asm |ipa
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://godbolt.org/z/4T4x8eb4f
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
2021-07-06 22:36 ` [Bug ipa/101354] " pinskia at gcc dot gnu.org
@ 2021-07-07 6:48 ` rguenth at gcc dot gnu.org
2021-07-07 6:50 ` rguenth at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2021-07-07 6:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Ever confirmed|0 |1
Last reconfirmed| |2021-07-07
Target Milestone|--- |11.2
Status|UNCONFIRMED |NEW
CC| |hubicka at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Likely modref, but then IPA eventually generally mishandles "naked" functions.
Note that "naked" is a target attribute so what we likely need is a target hook
computing extra "body" flags?
Or are traditional asm allowed to access & modify auto variables and
parameters? I think only for "naked" functions such access is reliably
possible.
Not sure if there's a way for IPA to query for target attributes that have
effects on IPA semantics.
^ permalink raw reply [flat|nested] 12+ messages in thread* [Bug ipa/101354] [11/12 regression] naked function mishandled - store optimized away
2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
2021-07-06 22:36 ` [Bug ipa/101354] " pinskia at gcc dot gnu.org
2021-07-07 6:48 ` rguenth at gcc dot gnu.org
@ 2021-07-07 6:50 ` rguenth at gcc dot gnu.org
2021-07-12 4:17 ` marxin at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2021-07-07 6:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
OTOH decl-attributes.c has generic code doing
/* A "naked" function attribute implies "noinline" and "noclone" for
those targets that support it. */
if (TREE_CODE (*node) == FUNCTION_DECL
&& attributes
&& lookup_attribute ("naked", attributes) != NULL
&& lookup_attribute_spec (get_identifier ("naked")))
{
if (lookup_attribute ("noinline", attributes) == NULL)
attributes = tree_cons (get_identifier ("noinline"), NULL, attributes);
if (lookup_attribute ("noclone", attributes) == NULL)
attributes = tree_cons (get_identifier ("noclone"), NULL, attributes);
}
maybe we should simply add "noipa" and eventually also "used" to it ... (if
that's enough)
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
` (2 preceding siblings ...)
2021-07-07 6:50 ` rguenth at gcc dot gnu.org
@ 2021-07-12 4:17 ` marxin at gcc dot gnu.org
2021-07-28 7:07 ` rguenth at gcc dot gnu.org
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From: marxin at gcc dot gnu.org @ 2021-07-12 4:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I can work on that then..
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
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2021-07-12 4:17 ` marxin at gcc dot gnu.org
@ 2021-07-28 7:07 ` rguenth at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2021-07-28 7:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|11.2 |11.3
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 11.2 is being released, retargeting bugs to GCC 11.3
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2021-07-28 7:07 ` rguenth at gcc dot gnu.org
@ 2021-08-13 14:04 ` cvs-commit at gcc dot gnu.org
2022-01-17 14:04 ` [Bug ipa/101354] [11 " rguenth at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2021-08-13 14:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <marxin@gcc.gnu.org>:
https://gcc.gnu.org/g:4998404915bba9cb04c438a926cdf7126782a767
commit r12-2901-g4998404915bba9cb04c438a926cdf7126782a767
Author: Martin Liska <mliska@suse.cz>
Date: Thu Aug 12 17:26:51 2021 +0200
ipa: "naked" attribute implies "noipa" attribute
PR ipa/101354
gcc/ChangeLog:
* attribs.c (decl_attributes): Make naked functions "noipa"
functions.
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
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2021-08-13 14:04 ` cvs-commit at gcc dot gnu.org
@ 2022-01-17 14:04 ` rguenth at gcc dot gnu.org
2022-01-17 14:06 ` marxin at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2022-01-17 14:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|hubicka at gcc dot gnu.org |marxin at gcc dot gnu.org
Summary|[11/12 regression] naked |[11 regression] naked
|function mishandled - store |function mishandled - store
|optimized away |optimized away
Known to work| |12.0
Priority|P3 |P2
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
naked is now implying noipa for GCC 12, backport still necessary.
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
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2022-01-17 14:04 ` [Bug ipa/101354] [11 " rguenth at gcc dot gnu.org
@ 2022-01-17 14:06 ` marxin at gcc dot gnu.org
2022-01-18 13:27 ` cvs-commit at gcc dot gnu.org
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From: marxin at gcc dot gnu.org @ 2022-01-17 14:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm going to do the backport.
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
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2022-01-17 14:06 ` marxin at gcc dot gnu.org
@ 2022-01-18 13:27 ` cvs-commit at gcc dot gnu.org
2022-01-18 13:27 ` marxin at gcc dot gnu.org
2023-10-20 16:31 ` pinskia at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2022-01-18 13:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Martin Liska
<marxin@gcc.gnu.org>:
https://gcc.gnu.org/g:806d0ce8cb0c1b690e6b5774a5eb3a1404a21253
commit r11-9477-g806d0ce8cb0c1b690e6b5774a5eb3a1404a21253
Author: Martin Liska <mliska@suse.cz>
Date: Thu Aug 12 17:26:51 2021 +0200
ipa: "naked" attribute implies "noipa" attribute
PR ipa/101354
gcc/ChangeLog:
* attribs.c (decl_attributes): Make naked functions "noipa"
functions.
(cherry picked from commit 4998404915bba9cb04c438a926cdf7126782a767)
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
` (8 preceding siblings ...)
2022-01-18 13:27 ` cvs-commit at gcc dot gnu.org
@ 2022-01-18 13:27 ` marxin at gcc dot gnu.org
2023-10-20 16:31 ` pinskia at gcc dot gnu.org
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From: marxin at gcc dot gnu.org @ 2022-01-18 13:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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2021-07-06 22:33 [Bug inline-asm/101354] New: [11/12 regression] naked function mishandled - store optimized away 2-gnu at 0x2c dot org
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2022-01-18 13:27 ` marxin at gcc dot gnu.org
@ 2023-10-20 16:31 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2023-10-20 16:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101354
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lukas.graetz@tu-darmstadt.d
| |e
--- Comment #11 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 111896 has been marked as a duplicate of this bug. ***
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