* graphite-optimize-isl.c (optimize_isl): Call
       isl_options_set_schedule_maximize_band_depth.

       * gcc.dg/graphite/fuse-1.c: New.
       * gcc.dg/graphite/fuse-2.c: New.
       * gcc.dg/graphite/interchange-13.c: Remove bogus check.

Co-Authored-By: Sebastian Pop <s.pop@samsung.com>

From-SVN: r229889