re PR rtl-optimization/53706 (Bootstrap failure due to "Invalid write of size 8…

re PR rtl-optimization/53706 (Bootstrap failure due to "Invalid write of size 8 at 0xBDC35E: variable_htab_free (var-tracking.c:1418))

PR debug/53706
PR debug/47624
* var-tracking.c (vt_emit_notes): Release loc_exp_dep_pool...
(vt_finalize): ... here instead, if needed.

From-SVN: r189037

gcc/ChangeLog

+2012-06-28  Alexandre Oliva  <aoliva@redhat.com>,
+            Uros Bizjak  <ubizjak@gmail.com>,
+            Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/53706
+	PR debug/47624
+	* var-tracking.c (vt_emit_notes): Release loc_exp_dep_pool...
+	(vt_finalize): ... here instead, if needed.
+
 2012-06-28  Alexandre Oliva  <aoliva@redhat.com>
 
 	PR debug/53740

gcc/var-tracking.c

@@ -9260,11 +9260,7 @@ vt_emit_notes (void)
   dataflow_set_destroy (&cur);
 
   if (MAY_HAVE_DEBUG_INSNS)
-    {
-      free_alloc_pool (loc_exp_dep_pool);
-      loc_exp_dep_pool = NULL;
     htab_delete (dropped_values);
-    }
 
   emit_notes = false;
 }
@@ -9974,6 +9970,9 @@ vt_finalize (void)
 
   if (MAY_HAVE_DEBUG_INSNS)
     {
+      if (loc_exp_dep_pool)
+	free_alloc_pool (loc_exp_dep_pool);
+      loc_exp_dep_pool = NULL;
       free_alloc_pool (valvar_pool);
       VEC_free (rtx, heap, preserved_values);
       cselib_finish ();