[OpenMP][OMPT] Mark dispatch callback as sometimes on registration (#212991)
Recently, multiple issues in the implementation of the `dispatch`
callback have been found (e.g., #212784, #207746). In these, the code
generation done by Clang and Flang does not provide a sufficient amount
of information for the runtime to dispatch the correct amount of flags,
or a callback for a given event at all.
These missing and incorrect events do not satisfy OpenMP's requirement
for `ompt_set_always` as a registration result, as the runtime does not
trace or invoke the correct callback whenever an associated event occurs
(OpenMP v5.2, p. 457, l.5-6).
As such, change the registration result for the `dispatch` callback to
`ompt_set_sometimes` for now, which is fulfilled. Here, an
implementation can dispatch callbacks or trace an implementation-defined
subset of associated event occurrences.
Based on the changed registration result, a tool can then decide if they
are still interested in recording the information provided by the
runtime implementation.
Signed-off-by: Jan André Reuter <j.reuter@fz-juelich.de>
llvm-project
199678b3 - [OpenMP][OMPT] Mark dispatch callback as sometimes on registration (#212991)
