re PR tree-optimization/26420 (-ftree-vectorizer-verbose=1 prints unvectorized loops information)

2007-03-05  Richard Guenther  <rguenther@suse.de>
	Dorit Nuzman  <dorit@il.ibm.com>

	PR tree-optimization/26420
	* tree-vectorizer.c (vectorize_loops): Bail out early if there
	are no loops in the function.  Only print the number of
	vectorized loops if it is greater than zero or we are supposed
	to print information about unvectorized loops.

Co-Authored-By: Dorit Nuzman <dorit@il.ibm.com>

From-SVN: r122544

gcc/ChangeLog

+2007-03-05  Richard Guenther  <rguenther@suse.de>
+	Dorit Nuzman  <dorit@il.ibm.com>
+
+	PR tree-optimization/26420
+	* tree-vectorizer.c (vectorize_loops): Bail out early if there
+	are no loops in the function.  Only print the number of
+	vectorized loops if it is greater than zero or we are supposed
+	to print information about unvectorized loops.
+
 2007-03-05  Revital Eres  <eres@il.ibm.com>
 
       * gcc.dg/var-expand1.c: New test.

gcc/tree-vectorizer.c

@@ -2196,6 +2196,12 @@ vectorize_loops (void)
   loop_iterator li;
   struct loop *loop;
 
+  vect_loops_num = number_of_loops ();
+
+  /* Bail out if there are no loops.  */
+  if (vect_loops_num <= 1)
+    return 0;
+
   /* Fix the verbosity level if not defined explicitly by the user.  */
   vect_set_dump_settings ();
 
@@ -2208,7 +2214,6 @@ vectorize_loops (void)
   /* If some loop was duplicated, it gets bigger number 
      than all previously defined loops. This fact allows us to run 
      only over initial loops skipping newly generated ones.  */
-  vect_loops_num = number_of_loops ();
   FOR_EACH_LOOP (li, loop, 0)
     {
       loop_vec_info loop_vinfo;
@@ -2225,7 +2230,9 @@ vectorize_loops (void)
     }
   vect_loop_location = UNKNOWN_LOC;
 
-  if (vect_print_dump_info (REPORT_VECTORIZED_LOOPS))
+  if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS)
+      || (vect_print_dump_info (REPORT_VECTORIZED_LOOPS)
+	  && num_vectorized_loops > 0))
     fprintf (vect_dump, "vectorized %u loops in function.\n",
 	     num_vectorized_loops);