public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug middle-end/86680] possible gcc optimization
[not found] <bug-86680-4@http.gcc.gnu.org/bugzilla/>
@ 2023-06-09 18:13 ` pinskia at gcc dot gnu.org
2024-06-26 6:08 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-06-09 18:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86680
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
--- Comment #12 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
These days we get:
_1 = (unsigned long) &__bss_end1;
_7 = _1 + 18446744073709551615;
_6 = (unsigned long) &__bss_start1;
_11 = _7 - _6;
_12 = _11 >> 3;
_13 = _12 + 1;
_14 = _13 * 8;
__builtin_memset (&__bss_start1, 0, _14); [tail call]
Or
((((end - 1) - start) >> 3) + 1) * 8
In theory (I think) we could do:
(end - start + 7) & -8
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug middle-end/86680] possible gcc optimization
[not found] <bug-86680-4@http.gcc.gnu.org/bugzilla/>
2023-06-09 18:13 ` [Bug middle-end/86680] possible gcc optimization pinskia at gcc dot gnu.org
@ 2024-06-26 6:08 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-06-26 6:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86680
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.0 |---
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2024-06-26 6:08 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <bug-86680-4@http.gcc.gnu.org/bugzilla/>
2023-06-09 18:13 ` [Bug middle-end/86680] possible gcc optimization pinskia at gcc dot gnu.org
2024-06-26 6:08 ` pinskia at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).