[PATCH 02/12] mode-switching: Add note problem

[Richard Sandiford]

optimize_mode_switching uses REG_DEAD notes to track register
liveness, but it failed to tell DF to calculate up-to-date notes.

Noticed by inspection.  I don't have a testcase that fails
because of this.

gcc/
        * mode-switching.cc (optimize_mode_switching): Call
        df_note_add_problem.
---

I was tempted to apply this as obvious, but wasn't sure if I was
missing something.

 gcc/mode-switching.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/mode-switching.cc b/gcc/mode-switching.cc
index c3e4d24de9b..8577069bde1 100644
--- a/gcc/mode-switching.cc
+++ b/gcc/mode-switching.cc
@@ -541,6 +541,7 @@ optimize_mode_switching (void)
       pre_exit = create_pre_exit (n_entities, entity_map, num_modes);
     }
 
+  df_note_add_problem ();
   df_analyze ();
 
   /* Create the bitmap vectors.  */
-- 
2.25.1