[PRL] A FORTRAN question

[Viera Proulx]

My husband is working with some legacy FORTRAN code and would like to determine for a given subroutine invocation for every item in the argument list is (potentially) mutated within the called subroutine (or any subroutines called from it...), or whether the argument is only used a 'input', i.e. is guaranteed not to be mutated.

Does anyone know of a tool that could do this type of analysis? It could be a commercial tool - his company is willing to invest in such a thing.

Thanks,

-- Viera