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* [Bug target/113084] New: aarch64: vget_low blocks tail-call
@ 2023-12-19 16:30 joe.ramsay at arm dot com
2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: joe.ramsay at arm dot com @ 2023-12-19 16:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084
Bug ID: 113084
Summary: aarch64: vget_low blocks tail-call
Product: gcc
Version: 13.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: joe.ramsay at arm dot com
Target Milestone: ---
In the following, f could be tail-called.
#include <arm_neon.h>
float32x4_t f(float32x4_t);
float32x2_t g(float32x2_t x) {
return vget_low_f32 (f (vcombine_f32 (x, x)));
}
however GCC 13 emits the following at O1, O2 and O3
g:
ins v0.d[1], v0.d[0]
stp x29, x30, [sp, -16]!
mov x29, sp
bl f
ldp x29, x30, [sp], 16
ret
I observed the same or worse codegen for all versions of Arm64 GCC on Compiler
Explorer
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call
2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com
@ 2023-12-19 16:57 ` pinskia at gcc dot gnu.org
2023-12-19 16:57 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-12-19 16:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |middle-end
Keywords| |missed-optimization
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Gcc also currently does not support tail calls if the types change. There is
another bug about that.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call
2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com
2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org
@ 2023-12-19 16:57 ` pinskia at gcc dot gnu.org
2023-12-19 17:26 ` pinskia at gcc dot gnu.org
2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-12-19 16:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call
2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com
2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org
2023-12-19 16:57 ` pinskia at gcc dot gnu.org
@ 2023-12-19 17:26 ` pinskia at gcc dot gnu.org
2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-12-19 17:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=14441,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=107503
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-12-19
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also related to PR 107503 .
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/113084] aarch64: vget_low blocks tail-call
2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com
` (2 preceding siblings ...)
2023-12-19 17:26 ` pinskia at gcc dot gnu.org
@ 2024-01-26 5:19 ` pinskia at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-01-26 5:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|middle-end |target
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Oh __builtin_aarch64_get_lowv4sf is not lowered to BIT_FIELD_REF either which
it can be now.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-01-26 5:19 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com
2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org
2023-12-19 16:57 ` pinskia at gcc dot gnu.org
2023-12-19 17:26 ` pinskia at gcc dot gnu.org
2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org
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