toplev.c (rest_of_handle_cfg): Add reg_scan pass if we're running mark_constant_function.

2004-01-09  Eric Christopher  <echristo@redhat.com>

	* toplev.c (rest_of_handle_cfg): Add reg_scan pass
	if we're running mark_constant_function.

From-SVN: r75634

gcc/ChangeLog

+2004-01-09  Eric Christopher  <echristo@redhat.com>
+
+	* toplev.c (rest_of_handle_cfg): Add reg_scan pass
+	if we're running mark_constant_function.
+
 2004-01-09  Jeff Bailey  <jbailey@nisa.net>
 
 	PR target/12561

gcc/toplev.c

@@ -2512,7 +2512,12 @@ rest_of_handle_cfg (tree decl, rtx insns)
      life_analysis rarely eliminates modification of external memory.
    */
   if (optimize)
+    {
+      /* Alias analysis depends on this information and mark_constant_function
+       depends on alias analysis.  */
+      reg_scan (insns, max_reg_num (), 1);
       mark_constant_function ();
+    }
 
   close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
 }