Fix PR42178.
2010-01-05 Sebastian Pop <sebastian.pop@amd.com>
PR middle-end/42178
* graphite-interchange.c (lst_try_interchange_loops): Do not return
the before, nest, and after LSTs.
(lst_try_interchange): Removed.
(lst_interchange_select_inner): Do not iterate over the LSTs if they
were modified.
(lst_interchange_select_outer): Apply interchange on the outer loop
until there are no more changes in the inner loops.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/graphite@155665 138bc75d-0d04-0410-961f-82ee72b054a4