[Beignet] [PATCH] GBE: fix a src/dst register reuse bug.

[Song, Ruiling]

> -----Original Message-----
> From: Beignet [mailto:beignet-bounces at lists.freedesktop.org] On Behalf Of
> Yang Rong
> Sent: Tuesday, December 20, 2016 4:47 PM
> To: beignet at lists.freedesktop.org
> Cc: Yang, Rong R <rong.r.yang at intel.com>
> Subject: [Beignet] [PATCH] GBE: fix a src/dst register reuse bug.
> 
> For case:
>  mad(8)          g4<1>:F         g4.1<0,1,0>:F   g127.7<0,1,0>:F g46:F
> src0 is uniform, dst is non-uniform, dst can't reuse the src0.
why g4.0 cannot be reused here? What's wrong here?