]PATCH] Rewrite part of tree-affine for pointer plus (rest element)

["Andrew Pinski" <pinskia at gmail dot com>]

Hi,
 This patch fixes the affine errors when more than MAX_AFF_ELTS level
of an affine are used for a pointer type.  The fix is simple and use
sizetype for rest instead of the pointer type (it will most likely be
sizetype already anyways).

OK? Bootstrapped and tested on i686-linux-gnu with no regressions and
pr32417.f90 at -O is now fixed.  Also I tested C bootstrap/test with
MAX_AFF_ELTS set to 1 (to invoke this code during a bootstrap) and
there were no failures there (except for one which is expected as it
was expecting the affine code to support 2 levels of affine).

Thanks,
Andrew Pinski

ChangeLog:
       PR tree-opt/32527
       * tree-affine.h (aff_tree): The type of rest is sizetype for types
       of pointers.
       * tree-affine.c (aff_combination_scale): If type is a pointer type,
       use sizetype for rest.
       (aff_combination_add_elt): Likewise. Don't specialize pointer types.
       (aff_combination_convert): Don't convert rest for pointer types.

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