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[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-threadupdate.c

diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c
index f6bf1db..a89a438 100644 (file)
--- a/gcc/tree-ssa-threadupdate.c
+++ b/gcc/tree-ssa-threadupdate.c
@@ -15,8 +15,8 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA.  */
 
 #include "config.h"
 #include "system.h"
@@ -29,7 +29,6 @@ Boston, MA 02111-1307, USA.  */
 #include "ggc.h"
 #include "basic-block.h"
 #include "output.h"
-#include "errors.h"
 #include "expr.h"
 #include "function.h"
 #include "diagnostic.h"
@@ -148,6 +147,16 @@ struct local_info
   bool jumps_threaded;
 };
 
+/* Jump threading statistics.  */
+
+struct thread_stats_d
+{
+  unsigned long num_threaded_edges;
+};
+
+struct thread_stats_d thread_stats;
+
+
 /* Remove the last statement in block BB if it is a control statement
    Also remove all outgoing edges except the edge which reaches DEST_BB.
    If DEST_BB is NULL, then remove all outgoing edges.  */
@@ -299,6 +308,9 @@ create_edge_and_update_destination_phis (struct redirection_data *rd)
   edge e = make_edge (rd->dup_block, rd->outgoing_edge->dest, EDGE_FALLTHRU);
   tree phi;
 
+  e->probability = REG_BR_PROB_BASE;
+  e->count = rd->dup_block->count;
+
   /* If there are any PHI nodes at the destination of the outgoing edge
      from the duplicate block, then we will need to add a new argument
      to them.  The argument should have the same value as the argument
@@ -587,6 +599,8 @@ redirect_edges (void **slot, void *data)
          to clear it will cause all kinds of unpleasant problems later.  */
       e->aux = NULL;
 
+      thread_stats.num_threaded_edges++;
+
       if (rd->dup_block)
        {
          edge e2;
@@ -809,6 +823,7 @@ thread_through_all_blocks (bitmap threaded_blocks)
   bitmap_iterator bi;
 
   rediscover_loops_after_threading = false;
+  memset (&thread_stats, 0, sizeof (thread_stats));
 
   EXECUTE_IF_SET_IN_BITMAP (threaded_blocks, 0, i, bi)
     {
@@ -818,5 +833,9 @@ thread_through_all_blocks (bitmap threaded_blocks)
        retval |= thread_block (bb);
     }
 
+  if (dump_file && (dump_flags & TDF_STATS))
+    fprintf (dump_file, "\nJumps threaded: %lu\n",
+            thread_stats.num_threaded_edges);
+
   return retval;
 }