[Beignet] [OCL20 PATCH V2] GBE:Add LLVM3.8 support

[Song, Ruiling]

> -----Original Message-----
> From: Beignet [mailto:beignet-bounces at lists.freedesktop.org] On Behalf Of
> Pan Xiuli
> Sent: Wednesday, November 18, 2015 5:28 PM
> To: beignet at lists.freedesktop.org
> Cc: Pan, Xiuli <xiuli.pan at intel.com>
> Subject: [Beignet] [OCL20 PATCH V2] GBE:Add LLVM3.8 support
> 
> LLVM3.8 does not support iterator implicit cast to pointer, so add change
> type for these uses. And due to the refine of ScalarEvolution, the using
> namespace llvm::legacy is not enough to tell comilper which PassManager
> to use, refine the PassManager declaration.
> Now CallInst::hasStructRetAttr() will assert if there is no argments,
> don't know if it is a llvm bug or our fault, just workaround it now.
It looks like llvm bug. The workaround is OK for me.
And the patch LG.

Thanks!
Ruiling