2010-04-15 Joel Sherrill <joel.sherrill@oarcorp.com>

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

diff --git a/gcc/graphite-blocking.c b/gcc/graphite-blocking.c
index b5f5acd..f7ddae2 100644 (file)
--- a/gcc/graphite-blocking.c
+++ b/gcc/graphite-blocking.c
@@ -174,11 +174,11 @@ pbb_strip_mine_time_depth (poly_bb_p pbb, int time_depth, int stride)
 }
 
 /* Returns true when strip mining with STRIDE of the loop around PBB
-   at scattering time TIME_DEPTH is profitable.  */
+   at DEPTH is profitable.  */
 
 static bool
 pbb_strip_mine_profitable_p (poly_bb_p pbb,
-                            graphite_dim_t time_depth,
+                            graphite_dim_t depth,
                             int stride)
 {
   Value niter, strip_stride;
@@ -187,7 +187,7 @@ pbb_strip_mine_profitable_p (poly_bb_p pbb,
   value_init (strip_stride);
   value_init (niter);
   value_set_si (strip_stride, stride);
-  pbb_number_of_iterations_at_time (pbb, time_depth, niter);
+  pbb_number_of_iterations_at_time (pbb, psct_dynamic_dim (pbb, depth), niter);
   res = value_gt (niter, strip_stride);
   value_clear (strip_stride);
   value_clear (niter);
@@ -234,6 +234,7 @@ lst_do_strip_mine (lst_p lst)
   lst_p l;
   bool res = false;
   int stride = PARAM_VALUE (PARAM_LOOP_BLOCK_TILE_SIZE);
+  int depth;
 
   if (!lst
       || !LST_LOOP_P (lst))
@@ -242,8 +243,10 @@ lst_do_strip_mine (lst_p lst)
   for (i = 0; VEC_iterate (lst_p, LST_SEQ (lst), i, l); i++)
     res |= lst_do_strip_mine (l);
 
-  if (pbb_strip_mine_profitable_p (LST_PBB (lst_find_first_pbb (lst)),
-                                  lst_depth (lst), stride))
+  depth = lst_depth (lst);
+  if (depth >= 0
+      && pbb_strip_mine_profitable_p (LST_PBB (lst_find_first_pbb (lst)),
+                                     depth, stride))
     {
       res |= lst_do_strip_mine_loop (lst, lst_depth (lst));
       lst_add_loop_under_loop (lst);
@@ -252,7 +255,6 @@ lst_do_strip_mine (lst_p lst)
   return res;
 }
 
-
 /* Strip mines all the loops in SCOP.  Nothing profitable in all this:
    this is just a driver function.  */
 
@@ -277,4 +279,33 @@ scop_do_strip_mine (scop_p scop)
   return transform_done;
 }
 
+/* Loop blocks all the loops in SCOP.  Returns true when we manage to
+   block some loops.  */
+
+bool
+scop_do_block (scop_p scop)
+{
+  bool strip_mined = false;
+  bool interchanged = false;
+
+  store_scattering (scop);
+
+  strip_mined = lst_do_strip_mine (SCOP_TRANSFORMED_SCHEDULE (scop));
+  interchanged = scop_do_interchange (scop);
+
+  /* If we don't interchange loops, then the strip mine is not
+     profitable, and the transform is not a loop blocking.  */
+  if (!interchanged
+      || !graphite_legal_transform (scop))
+    {
+      restore_scattering (scop);
+      return false;
+    }
+  else if (strip_mined && interchanged
+          && dump_file && (dump_flags & TDF_DETAILS))
+    fprintf (dump_file, "SCoP will be loop blocked.\n");
+
+  return strip_mined || interchanged;
+}
+
 #endif