[clang] [llvm] [OpenACC] Switch Clang to use the Flang 'appertainment' rules for cla… (PR #135372)

[Erich Keane via llvm-commits]

erichkeane wrote:

> > Updated list:
> > ```
> > Disagreements on 'num_gangs' appearing >1x on kernels/kernels-loop (justification for kernels-loop should apply to kernels as well?) (UNK way forward right now)
> >     Clang :: SemaOpenACC/compute-construct-num_gangs-clause.c
> >   
> > FLANG: prohibits device_num >1x  (UNK way forward RN).
> >   Clang :: SemaOpenACC/init-construct.cpp
> >   Clang :: SemaOpenACC/shutdown-construct.cpp
> >   
> > Disagreement on 'bind' on a 'routine'. (UNK way forward right now)
> >    Clang :: SemaOpenACC/routine-construct-clauses.cpp
> > ```
> 
> In discussion, we decided that `bind` probably should follow the same rules as "Implemented proposed change for 'routine' gang/worker/vector/seq. (see issue 539)". So I'll follow-up on that after this.



We discussed/solved 'bind', so:
```
 Disagreements on 'num_gangs' appearing >1x on kernels/kernels-loop (justification for kernels-loop should apply to kernels as well?) (UNK way forward right now)
     Clang :: SemaOpenACC/compute-construct-num_gangs-clause.c
   
 FLANG: prohibits device_num >1x  (UNK way forward RN).
   Clang :: SemaOpenACC/init-construct.cpp
   Clang :: SemaOpenACC/shutdown-construct.cpp
```



https://github.com/llvm/llvm-project/pull/135372