[Openmp-dev] "teams distribute and update "clause"

[Jonas Hahnfeld via Openmp-dev]

Hi Gabriele,

the offloading support is currently in the process of being upstreamed 
and more functionality is expected to come soon.
In addition, upstream Clang currently cannot generate correct code for 
all parsed OpenMP pragmas, especially not for all combined ones if I 
remember correctly.

That said, my current build of trunk Clang 6.0.0 was able to parse 
"teams distribute" (didn't test "update"). Can you post the output of 
clang --version?

For the compiler flags: If you actually want Clang to generate code for 
offloading, you have to specify the target triples with 
-fopenmp-targets=<...>. For GPUs, this would be 
-fopenmp-targets=nvptx64-nvidia-cuda and you can specify the compute 
capability with -Xopenmp-target -march=sm_60.

Regards,
Jonas

Am 2017-10-16 20:39, schrieb Jost, Gabriele (ARC-TNE)[CSRA, LLC] via 
Openmp-dev:
> Hello,
> 
> I had high hopes for clang to support OpenMP4.5 target offload. I
> recently installed the latest version 6.0.0, but a lot of essential
> functionality seems to be missing.
> 
> For example:
> 
> cang  -c -I../common   -O3 -fopenmp=libomp –cuda-path=${CUDA_ROOT}
> ft.c
> 
> ft.c:286:19: warning: extra tokens at the end of '#pragma omp teams'
> are ignored [-Wextra-tokens]
> 
> #pragma omp teams distribute
> 
> ft.c:300:20: error: unexpected OpenMP clause 'update' in directive
> '#pragma omp target'
> 
> #pragma omp target update from(u0_real,u0_imag,u1_real,u1_imag)
> 
> Do you think there is something wrong with my install or maybe I am
> using the wrong compiler flags.
> 
> My apologies if this is the wrong mailing list for such kind of
> questions.
> 
> Gabriele
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