Some testing found an issue in class.cc (in the new _callback function)
– updated patch attached (long version + interdiff).

Tobias

(PS: OG11 - original patch was committed as
https://gcc.gnu.org/g:98961d3a0ccb02d7d54d2d4dd07cca75473d685a ;
follow-up version to be committed in a moment)

On 01.03.22 16:34, Tobias Burnus wrote:
> Hi all,
>
> this patch adds support for mapping something like
>   type t
>     type(t2), allocatable :: a, b(:)
>     integer, allocatable :: c, c(:)
>   end type t
>   type(t), allocatable :: var, var2(:,:)
>
>   !$omp target enter data map(var, var)
>
> which does a deep walk of the components at runtime.
>
> On the ME side, the static addr/size/kinds arrays are
> replaced (only if need) by allocatable arrays – which
> are then filled by trans-openmp.c.
>
> All deep-mapping handling happens via the hooks called
> late in omp-low.c such that removing mappings or implicitly
> added one are handled.
>
> In principle, there is also code to handle polymorphic
> variables (new callback function in vtable + two on-the-fly
> generated functions to be used for walking the vtable).
>
> Issues: None known, but I am sure with experimenting,
> more can be found - especially with arrays/array sections
> and polymorphism, I expect issues. I did find some on the
> way and fixed them - but (see PR refs in testcase -7.f90),
> I also found unrelated bugs, which I did not fix ;-)
>
> Comments? OK for mainline (GCC 13)?
>
> Tobias
>
> PS: I will commit this patch to OG11 for further testing.
> PPS: Previously discussed at
> https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586237.html
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