[flang-commits] [flang] [flang] WIP: attempting to add an atomicadd intrinsinc (PR #123490)

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jeanPerier wrote:

> Have you tried without adding the interface? Other intrinsics don't have a Fortran interface defined in a module.

Actually, intrinsic _module_  procedure must have a Fortran interface defined an intrinsic module file because they are only recognized if those modules are used. The table can also be used for those procedures since [this commit for ieee procedures](https://github.com/llvm/llvm-project/commit/124338dd8016dc7589685d9fc731b178f2b5d379#diff-6bb3b4929e13ba83349cd5d5e97eabaf0d3b88a87b83710c3842c69ca8801a6f).

@Renaud-K, in your test in the PR description, I do not see a `use cudadevice`, I think it is needed so that `atomicaddd` is resolved in semantics as being declared in the intrinsic module, and not being some user defined procedure.

https://github.com/llvm/llvm-project/pull/123490