re PR tree-optimization/57200 (aggressive-loop-optimizations notes appear even…

re PR tree-optimization/57200 (aggressive-loop-optimizations notes appear even when warning itself is suppressed)

2013-05-08  Paolo Carlini  <paolo.carlini@oracle.com>

	PR tree-optimization/57200
	* tree-ssa-loop-niter.c (do_warn_aggressive_loop_optimizations):
	Only call inform if the preceding warning_at returns true.

From-SVN: r198704

gcc/ChangeLog

+2013-05-08  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR tree-optimization/57200
+	* tree-ssa-loop-niter.c (do_warn_aggressive_loop_optimizations):
+	Only call inform if the preceding warning_at returns true.
+
 2013-05-07  Han Shen  <shenhan@google.com>
 
 	* cfgexpand.c (record_or_union_type_has_array_p): New function.

gcc/tree-ssa-loop-niter.c

@@ -2553,10 +2553,11 @@ do_warn_aggressive_loop_optimizations (struct loop *loop,
     return;
 
   gimple estmt = last_stmt (e->src);
-  warning_at (gimple_location (stmt), OPT_Waggressive_loop_optimizations,
-	      "iteration %E invokes undefined behavior",
-	      double_int_to_tree (TREE_TYPE (loop->nb_iterations), i_bound));
-  inform (gimple_location (estmt), "containing loop");
+  if (warning_at (gimple_location (stmt), OPT_Waggressive_loop_optimizations,
+		  "iteration %E invokes undefined behavior",
+		  double_int_to_tree (TREE_TYPE (loop->nb_iterations),
+				      i_bound)))
+    inform (gimple_location (estmt), "containing loop");
   loop->warned_aggressive_loop_optimizations = true;
 }