re PR middle-end/24093 (cgraph exhausts virtual memory building 197.parser with -profile-use -O3)

	PR middle-end/24093
	* cgraph.c (cgraph_clone_edge, cgraph_clone_node): Watch negative

From-SVN: r106291

gcc/ChangeLog

 2005-10-31  Jan Hubicka  <jh@suse.cz>
 
+	PR middle-end/24093
+	* cgraph.c (cgraph_clone_edge, cgraph_clone_node): Watch negative
+
 	PR target/20928
 	* i386.c (legitimize_pic_address): Deal with large immediates.
 

gcc/cgraph.c

@@ -895,7 +895,11 @@ cgraph_clone_edge (struct cgraph_edge *e, struct cgraph_node *n,
 
   new->inline_failed = e->inline_failed;
   if (update_original)
+    {
       e->count -= new->count;
+      if (e->count < 0)
+	e->count = 0;
+    }
   return new;
 }
 
@@ -931,7 +935,11 @@ cgraph_clone_node (struct cgraph_node *n, gcov_type count, int loop_nest,
   else
     count_scale = 0;
   if (update_original)
+    {
       n->count -= count;
+      if (n->count < 0)
+	n->count = 0;
+    }
 
   for (e = n->callees;e; e=e->next_callee)
     cgraph_clone_edge (e, new, e->call_stmt, count_scale, loop_nest,