dolfin team mailing list archive

[Martin Sandve Alnæs <martinal@xxxxxxxxx>]

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?

Martin