This patch introduce the basic infrastructure to be able to lower
OpenACC constructs to the future OpenACC dialect.
Right we might add a OpenACCEndCombinedDirective. Since it is not in the current parser, do you mind if we had this in a follow up patch together with the parsing part and some parsing tests?
That's the end of the loop block. Similar to pre-fir-tree03.f90 this is output for the !$omp do on line 32 check at line 41.