[cfe-dev] [OpenCL] Representing kernel attributes by LLVM target-dependent attribute-value pairs instead of metadata
Tom Stellard via cfe-dev
cfe-dev at lists.llvm.org
Thu May 12 08:54:55 PDT 2016
On Mon, May 09, 2016 at 08:05:11PM +0000, Liu, Yaxun (Sam) via cfe-dev wrote:
> Hi,
>
> When SPIR 1.2/2.0 spec was developed, there was no target-dependent attribute-value pair in LLVM. As such, kernel attributes were represented as metadata.
>
> This caused lots of inconvenience since these metadata are difficult to manipulate/change when kernel functions went through transformations in backends.
>
> Now LLVM supports target-dependent attribute-value pair, I am wondering whether it is time to use that to represent kernel attributes.
>
> e.g. something like (just to give an idea, not exact llvm IR)
>
> kernel void foo(global int*a, sampler_t s); #1
> #1 = {
> reqd_work_group_size="1 1 1",
> kernel_arg_type="int *, sampler_t",
> ...
> }
I don't really think the argument type information should be included in
the target attributes. It's optional information that the backend
doesn't need. It seems like metadata is more appropriate.
-Tom
>
> basically we keep the info conveyed by the original metadata but attach them to the kernel function as attribute/value pair. This will make these attributes much easier to manipulate/change.
>
> Any feedbacks? Thanks.
>
> Sam
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
More information about the cfe-dev
mailing list