add original schedule to scop

    * graphite-optimize-isl.c (optimize_isl): Call isl_union_map_is_equal.
    * graphite-poly.c (new_scop): Initialize original_schedule.
    (free_scop): Free original_schedule.
    * graphite-poly.h (struct scop): Add field original_schedule.
    * graphite-sese-to-poly.c (build_scop_original_schedule): New.
    (build_poly_scop): Call build_scop_original_schedule.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229910 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 16 insertions, 4 deletions

diff --git a/gcc/graphite-optimize-isl.c b/gcc/graphite-optimize-isl.c
index 0d859759da1..c09264bf093 100644
--- a/gcc/graphite-optimize-isl.c
+++ b/gcc/graphite-optimize-isl.c
@@ -441,11 +441,23 @@ optimize_isl (scop_p scop)
 #else
   isl_union_map *schedule_map = get_schedule_map (schedule);
 #endif
-  apply_schedule_map_to_scop (scop, schedule_map);
 
-  isl_schedule_free (schedule);
-  isl_union_map_free (schedule_map);
-  return true;
+  if (isl_union_map_is_equal (scop->original_schedule, schedule_map))
+    {
+      if (dump_file && dump_flags)
+	fprintf (dump_file, "\nISL schedule same as original schedule\n");
+
+      isl_schedule_free (schedule);
+      isl_union_map_free (schedule_map);
+      return false;
+    }
+  else
+    {
+      apply_schedule_map_to_scop (scop, schedule_map);
+      isl_schedule_free (schedule);
+      isl_union_map_free (schedule_map);
+      return true;
+    }
 }
 
 #endif /* HAVE_isl */