[m-rev.] for review: put .module_dep and .prof files into grade-specific subdirs

[Julien Fischer]

On Sun, 4 Aug 2024 at 18:17, Zoltan Somogyi <zoltan.somogyi at runbox.com> wrote:
>
>
>
> On Sun, 4 Aug 2024 16:05:16 +1000, Julien Fischer <jfischer at opturion.com> wrote:
> > On that basis, I think a brief entry in the NEWS file describing where
> > .prof files
> > will now be placed is worthwhile.
>
> While trying to write that NEWS.md entry, I realized something.
> The call graph of a module is in general grade-dependent,
> e.g. because there can be additional entries if the current grade
> selects the Mercury definition of a predicate vs a grade that selects
> a foreign_proc version. However, while I can see that such call-graph-affecting
> differences are possible between two arbitrarily-picked grades, I cannot see
> how any such differences are possible between two grades that both
> call for mprof profiling. This is because mprof profiling implies (a) targeting C,
> and (b) using the LLDS backend, which in turn implies that all mprof grades
> will have the same call graph.

Point (b) is not true, mprof profiling works with high-level C grades.

Julien.