[llvm-dev] [SPIR-V] SPIR-V in LLVM

[Tom Stellard via llvm-dev]

On 09/27/2017 05:21 AM, Tomeu Vizoso wrote:
> On 07/31/2017 02:30 PM, Nicholas Wilson via llvm-dev wrote:
>>
>>> On 31 Jul 2017, at 3:23 pm, Neil Henning <ll... at duskborn.com> wrote:
>>
>> Moving forward, other than securing the triples spirv32, spirv64, and spirvlogical from LLVM, how can we go about coordinating efforts? I feel that having one backend is a better use of everybody’s time than having three. If we don't get around to anything I’m sure we can organise something at IWOCL.
> 
> Hi there,
> 
> any news on coordination? We have customers who are successfully using
> Mesa in their products, and that are now asking about OpenCL.
> 

What hardware are they using?  Note that SPIR-V is not required to run
mesa's OpenCL on AMD hardware.

> My current impression is that easiest would be to do what Tom suggested
> before, and only re-evaluate inclusion in LLVM proper once things are
> more mature.
> 
> One path for me would be to take Khronos' or Nic's work and convert it
> into something that can be packaged by Linux distributions (so it needs
> to work with the latest LLVM release, with no patches).
> 
> Another path would be to extend clspv to cover the whole of OpenCL, but
> I don't know if Codeplay/Google are interested in taking such patches.
> 
> Is here interest in coordinating efforts?
> 

I recommend using clspv, in addition to having a clang-based driver
for compiling OpenCL C, it exposes the LLVM IR -> SPIR-V passes via
a header, so it should be easy to integrate it into existing
compilation pipelines.

It also is easy to package as it is already a stand-alone project.

-Tom



> Regards,
> 
> Tomeu
>