------- Comment #2 from pinskia at gcc dot gnu dot org 2005-12-02 20:44 -------
Actually it should generate code like:
lock; addl $-1,(%rdi)
jne .L4
jmp release
.L4:
ret
---
The lock is fully needed for correct behavior.
Confirmed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2005-12-02 20:44:30
date| |
Summary|__sync_add_and_fetch cannot |__sync_add_and_fetch does
|use condition flags from |not use condition flags from
|subl |subl
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25230
