Object with the CONSTANT attribute cannot be declared in the host
subprogram.
It can be declared in a module or a device subprogram.
Adapt the semantic check to trigger the error in host subprogram.
Lower CUDA attribute for simple dummy argument. This is done in a
similar way than `TARGET`, `OPTIONAL` and so on.
This patch also move the `Fortran::common::CUDADataAttr` to
`fir::CUDAAttributeAttr` mapping to
`flang/include/flang/Optimizer/Support/Utils.h` so that it can be reused
where needed.
This is a first simple patch to introduce a new FIR attribute to carry
the CUDA variable attribute information to hlfir.declare and fir.declare
operations. It currently lowers this information for local variables.
The texture attribute is omitted since it is rejected by semantic and
will not make its way to MLIR.
This new attribute is added as optional attribute to the hlfir.declare
and fir.declare operations.
