re PR tree-optimization/59951 (bootstrap comparison failure with -O3 for a week)

2014-01-30  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/59951
	* tree-vect-slp.c (vect_bb_slp_scalar_cost): Skip uses in debug
	insns.

From-SVN: r207299

gcc/ChangeLog

+2014-01-30  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/59951
+	* tree-vect-slp.c (vect_bb_slp_scalar_cost): Skip uses in debug
+	insns.
+
 2014-01-30  Savin Zlobec  <savin.zlobec@gmail.com>
 
 	PR target/59784

gcc/tree-vect-slp.c

@@ -1967,9 +1967,10 @@ vect_bb_slp_scalar_cost (basic_block bb,
 	  imm_use_iterator use_iter;
 	  gimple use_stmt;
 	  FOR_EACH_IMM_USE_STMT (use_stmt, use_iter, DEF_FROM_PTR (def_p))
-	    if (gimple_code (use_stmt) == GIMPLE_PHI
-		|| gimple_bb (use_stmt) != bb
-		|| !STMT_VINFO_VECTORIZABLE (vinfo_for_stmt (use_stmt)))
+	    if (!is_gimple_debug (use_stmt)
+		&& (gimple_code (use_stmt) == GIMPLE_PHI
+		    || gimple_bb (use_stmt) != bb
+		    || !STMT_VINFO_VECTORIZABLE (vinfo_for_stmt (use_stmt))))
 	      {
 		(*life)[i] = true;
 		BREAK_FROM_IMM_USE_STMT (use_iter);