tree.c (cp_build_qualified_type_real): If we're asking for the same quals we…

tree.c (cp_build_qualified_type_real): If we're asking for the same quals we already have, just return.

	* tree.c (cp_build_qualified_type_real): If we're asking for the
	same quals we already have, just return.

From-SVN: r28886

gcc/cp/ChangeLog

+1999-08-25  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* tree.c (cp_build_qualified_type_real): If we're asking for the
+	same quals we already have, just return.
+
 1999-08-25  Mark Mitchell  <mark@codesourcery.com>
 
 	* cp-tree.def (SUBOBJECT): New tree node.

gcc/cp/tree.c

@@ -508,7 +508,10 @@ cp_build_qualified_type_real (type, type_quals, complain)
 
   if (type == error_mark_node)
     return type;
-  
+
+  if (type_quals == TYPE_QUALS (type))
+    return type;
+
   /* A restrict-qualified pointer type must be a pointer (or reference)
      to object or incomplete type.  */
   if ((type_quals & TYPE_QUAL_RESTRICT)