[Bug other/108749] [OpenMP][C/C++/Fortran] inscan reduction modifier rejected for combined/composite constructs of simd/for/do

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108749

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We implement the 5.0 wording which was quite clear that only the selected
combined/composite constructs are allowed for it.  The clause handling wording
was added without considering the former (it wasn't initially there I believe).

Next step would be implement the 5.2 wording, which would be support those also
on
   #pragma omp masked taskloop simd
   #pragma omp master taskloop simd
   #pragma omp parallel masked taskloop simd
   #pragma omp parallel master taskloop simd
   #pragma omp target parallel for
   #pragma omp target parallel for simd
   #pragma omp target simd
   #pragma omp taskloop simd
I guess we could even do it for GCC 13, it is a simple change.