Restore original scattering when the transform is not legal.

[pf3gnuchains/gcc-fork.git] / gcc / graphite-interchange.c

diff --git a/gcc/graphite-interchange.c b/gcc/graphite-interchange.c
index 4639afe..785be70 100644 (file)
--- a/gcc/graphite-interchange.c
+++ b/gcc/graphite-interchange.c
@@ -388,9 +388,20 @@ scop_do_interchange (scop_p scop)
   poly_bb_p pbb;
   bool transform_done = false;
 
+  store_scattering (scop);
+
   for (i = 0; VEC_iterate (poly_bb_p, SCOP_BBS (scop), i, pbb); i++)
     transform_done |= pbb_do_interchange (pbb, scop);
 
+  if (!transform_done)
+    return false;
+
+  if (!graphite_legal_transform (scop))
+    {
+      restore_scattering (scop);
+      return false;
+    }
+
   return transform_done;
 }