On 11/29/2012 10:42 AM, Yvan Roux wrote:
Hi,
on ARMv7, the code generated for the __atomic_load builtins in the
__ATOMIC_ACQUIRE memory model, puts a memory barrier before the load, whereas
the semantic of the acquire memory model implies a barrier after.
The issue seems to be in expand_atomic_load which puts a memory fence before
the load in any memory model. The attached patch fixes the problem.
Patch is fine.
If you can confirm you have a copyright assignment on file I can take
care of checking it in.
Andrew
