On Mon, Nov 02, 2015 at 11:18:37AM -0500, Nathan Sidwell wrote:
> This is the core execution bits of OpenACC reductions.
>
> We have a new internal fn 'IFN_GOACC_REDUCTION' and a new target hook
> goacc.reduction, to lower it on the target compiler.
So, let me start with a few questions:
1) does OpenACC allow UDRs or only the built-in reductions? If it
does not allow UDRs, do you have it covered by testcases that you
disallow parsing of them (e.g. when you have
#pragma omp declare reduction (xyz: struct S: omp_out.x += omp_in.y)
initializer (omp_priv = { 5 })
#pragma acc parallel reduction (xyz: var_with_type_S)
)?
2) how do you expand the reductions in the end when targetting host fallback
or when targetting non-PTX targets?
Jakub
