dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Thu, May 26, 2011 at 03:10:54PM +0200, Martin Sandve Alnæs wrote:
> On 26 May 2011 14:46, Anders Logg <logg@xxxxxxxxx> wrote:
> > On Thu, May 26, 2011 at 12:44:56PM +0200, Martin Sandve Alnæs wrote:
> >> On 26 May 2011 12:36, Anders Logg <logg@xxxxxxxxx> wrote:
> >> > On Thu, May 26, 2011 at 12:12:22PM +0200, Martin Sandve Alnæs wrote:
> >> >> What is the prefix in this line?
> >> >>
> >> >>             (self._compiled_form, module, self.form_data, prefix) = \
> >> >>                 jit(form,
> >> >>                     form_compiler_parameters,
> >> >>                     common_cell)
> >> >
> >> > It's the prefix used by the JIT compiler for the generated code files.
> >> > For FFC, it is set to
> >> >
> >> >  prefix = "ffc_form_" + jit_object.signature()
> >>
> >> Why is it returned from jit? What is it used for?
> >
> > It is used in the FFC JIT compiler for elements. This relies on
> > creating the simplest possible form and then extracting the element
> > from it. It wasn't needed before, but turned out to be very useful
> > (perhaps even necessary) during the recent redesign of the JIT
> > compiler we went through with the preprocess/caching issues.
>
> If it's only used internally in ffc, why is it part of the official
> jit interface?

Just for convenience. Is it a problem to include it?

--
Anders