diagnostic.c (diagnostic_initialize): Update.

2010-02-26  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* diagnostic.c (diagnostic_initialize): Update.
	(diagnostic_report_diagnostic): Test inhibit_notes_p for
	informative notes.
	* diagnostic.h (diagnostic_context): New bool inhibit_notes_p.
	(diagnostic_inhibit_notes): New.
	* toplev.c (process_options): inhibit notes with -fcompare-debug.

From-SVN: r157100

gcc/ChangeLog

 2010-02-26  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
+	* diagnostic.c (diagnostic_initialize): Update.
+	(diagnostic_report_diagnostic): Test inhibit_notes_p for
+	informative notes.
+	* diagnostic.h (diagnostic_context): New bool inhibit_notes_p.
+	(diagnostic_inhibit_notes): New.
+	* toplev.c (process_options): inhibit notes with -fcompare-debug.
+
+2010-02-26  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
 	PR c/20631
 	* doc/cpp.texi: Use c90 instead of c89 and gnu90 instead of gnu89.
 	* doc/standards.texi: Likewise.

gcc/diagnostic.c

@@ -109,6 +109,7 @@ diagnostic_initialize (diagnostic_context *context)
   context->last_module = 0;
   context->last_function = NULL;
   context->lock = 0;
+  context->inhibit_notes_p = false;
 }
 
 /* Initialize DIAGNOSTIC, where the message MSG has already been
@@ -317,11 +318,11 @@ diagnostic_report_diagnostic (diagnostic_context *context,
       && !diagnostic_report_warnings_p (location))
     return false;
 
-  if (diagnostic->kind == DK_NOTE && flag_compare_debug)
-    return false;
-
   if (diagnostic->kind == DK_PEDWARN)
     diagnostic->kind = pedantic_warning_kind ();
+ 
+  if (diagnostic->kind == DK_NOTE && context->inhibit_notes_p)
+    return false;
 
   if (context->lock > 0)
     {

gcc/diagnostic.h

@@ -113,8 +113,17 @@ struct diagnostic_context
   const struct line_map *last_module;
 
   int lock;
+
+  bool inhibit_notes_p;
 };
 
+static inline void
+diagnostic_inhibit_notes (diagnostic_context * context)
+{
+  context->inhibit_notes_p = true;
+}
+
+
 /* Client supplied function to announce a diagnostic.  */
 #define diagnostic_starter(DC) (DC)->begin_diagnostic
 

gcc/toplev.c

@@ -1810,6 +1810,10 @@ process_options (void)
   OVERRIDE_OPTIONS;
 #endif
 
+  /* Avoid any informative notes in the second run of -fcompare-debug.  */
+  if (flag_compare_debug) 
+    diagnostic_inhibit_notes (global_dc);
+
   if (flag_section_anchors && !target_supports_section_anchors_p ())
     {
       warning (OPT_fsection_anchors,