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* [Bug c++/94794] New: coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls
@ 2020-04-27 10:21 iains at gcc dot gnu.org
2020-04-27 10:26 ` [Bug c++/94794] " iains at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: iains at gcc dot gnu.org @ 2020-04-27 10:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94794
Bug ID: 94794
Summary: coroutines: Support is needed for symmetric transter
on targets without arbitrary indirect tail-calls
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: iains at gcc dot gnu.org
Target Milestone: ---
For symmetric transfers to work with C++20 coroutines, it is
currently necessary to tail call the callee coroutine from resume
method of the caller coroutine.
Unfortunately, several targets have ABI constraints that prevent
arbitrary indirect tail-calls which means that we do not have a FE
design that works consistently (or at all for O < 2).
For some targets, where the tail calls are supported, it's possible
to mandate their use for O0 etc, but we'd need a target hook to test
this - the existing "ok for sib call" is not usable in the FE.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/94794] coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls
2020-04-27 10:21 [Bug c++/94794] New: coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls iains at gcc dot gnu.org
@ 2020-04-27 10:26 ` iains at gcc dot gnu.org
2021-04-27 11:38 ` jakub at gcc dot gnu.org
2021-07-28 7:04 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: iains at gcc dot gnu.org @ 2020-04-27 10:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94794
Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.0
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2020-04-27
Keywords| |ABI
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/94794] coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls
2020-04-27 10:21 [Bug c++/94794] New: coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls iains at gcc dot gnu.org
2020-04-27 10:26 ` [Bug c++/94794] " iains at gcc dot gnu.org
@ 2021-04-27 11:38 ` jakub at gcc dot gnu.org
2021-07-28 7:04 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-04-27 11:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94794
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|11.0 |11.2
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 11.1 has been released, retargeting bugs to GCC 11.2.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/94794] coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls
2020-04-27 10:21 [Bug c++/94794] New: coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls iains at gcc dot gnu.org
2020-04-27 10:26 ` [Bug c++/94794] " iains at gcc dot gnu.org
2021-04-27 11:38 ` jakub at gcc dot gnu.org
@ 2021-07-28 7:04 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-07-28 7:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94794
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|11.2 |---
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-07-28 7:04 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-04-27 10:21 [Bug c++/94794] New: coroutines: Support is needed for symmetric transter on targets without arbitrary indirect tail-calls iains at gcc dot gnu.org
2020-04-27 10:26 ` [Bug c++/94794] " iains at gcc dot gnu.org
2021-04-27 11:38 ` jakub at gcc dot gnu.org
2021-07-28 7:04 ` rguenth at gcc dot gnu.org
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