[Beignet] [PATCH] Add memory fence before barrier to support global memory barrier.

[Zhigang Gong]

On Tue, Jun 18, 2013 at 08:53:35AM +0000, Zou, Nanhai wrote:
> 〉〉But this issue still remains. Let's hold for a while to learn more about the barrier/SLM/memory fence and find out the real reason. One interesting thing is a memory fence can fix this failure. Maybe that's a clue.
> 
> You may push the SLM unit test from Rong first.
Done, the new test case name is compiler_local_memory_barrier_2.cpp and is disabled now.
If you want to try, please modify the utests/CMakeLists.txt.
> 
> Thanks
> Zou Nanhai
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