https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #12 from CVS Commits ---
The master branch has been updated by Jakub Jelinek :
https://gcc.gnu.org/g:9896e96d4cae00d0f4d2b694284cb30bbd9c80fc
commit r12-6577-g9896e96d4cae00d0f4d2b694284cb30bbd9c80fc
Author: Jakub Jelinek
Date: F
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #11 from Jakub Jelinek ---
Created attachment 52170
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52170&action=edit
gcc12-pr98737-canon.patch
Untested patch to fix up if users misuse the fetch_op or op_fetch atomic when
they s
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #10 from CVS Commits ---
The master branch has been updated by Jakub Jelinek :
https://gcc.gnu.org/g:6362627b27f395b054f359244fcfcb15ac0ac2ab
commit r12-6190-g6362627b27f395b054f359244fcfcb15ac0ac2ab
Author: Jakub Jelinek
Date: M
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
Jakub Jelinek changed:
What|Removed |Added
Attachment #50058|0 |1
is obsolete|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #8 from Ulrich Drepper ---
(In reply to Jakub Jelinek from comment #7)
> The sub fix won't be the same as would add, perhaps xor/or/and can be
> handled by the same peephole2, but even for that I'm not sure.
Just a proposal, but I ca
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #7 from Jakub Jelinek ---
The sub fix won't be the same as would add, perhaps xor/or/and can be handled
by the same peephole2, but even for that I'm not sure. Though e.g. trying
__atomic_or_fetch (&a, b, ...) == 0 doesn't seem to be
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #6 from Ulrich Drepper ---
(In reply to Jakub Jelinek from comment #5)
> Created attachment 50058 [details]
> gcc11-pr98737.patch
>
> Untested fix.
This only handles sub?
The same applies to add, or, and, xor. Maybe nand? Can thi
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
Jakub Jelinek changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #4
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #3 from Jonathan Wakely ---
(In reply to Uroš Bizjak from comment #2)
> This can be optimized with peephole2, we already have similar case in
> sync.md:
>
> ;; This peephole2 and following insn optimize
> ;; __sync_fetch_and_add (x,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
--- Comment #2 from Uroš Bizjak ---
This can be optimized with peephole2, we already have similar case in sync.md:
;; This peephole2 and following insn optimize
;; __sync_fetch_and_add (x, -N) == N into just lock {add,sub,inc,dec}
;; followed by
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98737
Richard Biener changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed|
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