[Openmp-dev] Question about gcc support related to file kmp_gsupport.cpp

[Tianyi Zhang via Openmp-dev]

Thanks, Jim,
I was wondering why there is a function :

PARALLEL_LOOP(KMP_EXPAND_NAME(KMP_API_NAME_GOMP_PARALLEL_LOOP_STATIC),
              kmp_sch_static, OMPT_LOOP_PRE, OMPT_LOOP_POST)

which maps gcc call to clang but never used or called.

On Wed, Oct 17, 2018 at 3:47 AM Cownie, James H <james.h.cownie at intel.com>
wrote:

> Your question is really about the code which is generated by gcc for a
> statically scheduled loop, which has nothing to do with the runtime.
>
>
>
> If you investigate how gcc compiles a statically scheduled OpenMP loop
> (look at https://godbolt.org/z/GtUnND for instance), you’ll see that
> there are no calls into the runtime for static loop scheduling.
>
>
>
> -- Jim
>
> Jim Cownie <james.h.cownie at intel.com>
> CVCG/DPD/TCAR (Technical Computing, Analyzers, and Runtimes)
>
> Tel: +44 117 9071438
>
>
>
> *From:* Openmp-dev [mailto:openmp-dev-bounces at lists.llvm.org] *On Behalf
> Of *Tianyi Zhang via Openmp-dev
> *Sent:* Tuesday, October 16, 2018 10:27 PM
> *To:* openmp-dev at lists.llvm.org
> *Subject:* [Openmp-dev] Question about gcc support related to file
> kmp_gsupport.cpp
>
>
>
> Hi,
>
> Could anyone familiar with the gcc support for llvm-openmp help with this:
>
>
>
> When I build everything with gcc, and using debug mode, the
> debugger refuses to stop at
>
>
>
> #pragma omp parallel
>
> #pragma omp *for *schedule(*static*)
>
>  It seems that for schedule(static) is not mapped to GCC.
>
>
>
> Or is there any marco that are introduced inside function
>
> KMP_EXPAND_NAME(KMP_API_NAME_GOMP_PARALLEL)
>
> As It is only calling this function when I was running the program.
>
>
>
>
>
> however, if I use
>
> #pragma omp parallel
>
> #pragma omp *for *schedule(dynamic)
>
> it is calling
>
> *void *KMP_EXPAND_NAME(KMP_API_NAME_GOMP_PARALLEL_LOOP_DYNAMIC)
>
>
>
> Thanks,
>
> Tianyi
>
>
>
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