[Bug target/48126] arm_output_sync_loop: misplaced memory barrier, missing clrex / dummy strex

[marcus.shawcroft at arm dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48126

--- Comment #7 from Marcus Shawcroft <marcus.shawcroft at arm dot com> 2011-06-23 09:32:59 UTC ---
(In reply to comment #5)
> Michael:
> I think I agree with you on the need for the barrier in the branch out case;
> gcc's info page (section 6.49 'Built-in functions for atomic memory access')
> state:

I agree. The DMB needs to be included in the branch out case in order to comply
with the "full barrier" requirement.

/Marcus