[RFC] Merge some ScalarCode improvements

[Richard Guenther]

Hi!

I have some improvements to ScalarCode which enhance its usability and
performance.  Unfortunately these patches depend on changes to
ScalarCodeInfo which in turn change user-visible API.  Patch to
ScalarCodeInfo appended below for reference.  The main change is
templating ScalarCodeInfo on dimension and number of MultiArg arguments.

Are you interested in having such changes merged?  Part of the changes
would be bugfixes to allow arbitrary expressions as ScalarCode arguments
(it doesnt handle updating guards correctly for shifted arguments at the
moment).

Richard.

--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/

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