e0054e984c
This PR aims to fix a mapping error when trying to map nullary elements of a record type (primary example is allocatables/pointer types in Fortran at the moment). This should be legal to map, just not write to without pointing to anything within the target region. A common Fortran OpenMP idiom/example where this is useful can be found in the added Fortran offload example. The runtime error arises when we try to map the pointer member utilising a prescribed constant size that we receive from the lowered type, resulting in mapping of data that will be non-existent when there is no allocated data. The fix in this case is to emit a runtime check to see if the data has been allocated, if it hasn't been we select a size of 0, if it has we emit the usual type size.
Flang Integration Tests
This directory can be used to add Integration tests involving multiple stages of the compiler (for eg. from Fortran to LLVM IR). It should not contain executable tests. We should only add tests here sparingly and only if there is no other way to test. Repeat this message in each test that is added to this directory and sub-directories.