revert: re PR tree-optimization/16115 (double-destruction problem with argument…

revert: re PR tree-optimization/16115 (double-destruction problem with argument passing via temporary (breaks auto_ptr))

	Revert:
	2004-06-24  Jason Merrill  <jason@redhat.com>
	PR c++/16115
	* decl.c (grokparms): Give the PARM_DECL reference type if the
	parameter is passed by invisible reference.

From-SVN: r84147

gcc/cp/ChangeLog

+2004-07-06  Mark Mitchell  <mark@codesourcery.com>
+
+	Revert:
+	2004-06-24  Jason Merrill  <jason@redhat.com>
+	PR c++/16115
+	* decl.c (grokparms): Give the PARM_DECL reference type if the
+	parameter is passed by invisible reference.
+
 2004-07-05  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* cp-lang.c (cp_var_mod_type_p): Add extra arg.

gcc/cp/decl.c

@@ -8220,13 +8220,6 @@ grokparms (cp_parameter_declarator *first_parm, tree *parms)
 
       if (type != error_mark_node)
 	{
-	  /* If this type is passed by invisible reference, make the PARM_DECL
-	     reflect that so that alias analysis knows that the actual object
-	     is external to the function.  */
-	  if (TREE_ADDRESSABLE (type))
-	    decl = build_decl (PARM_DECL, DECL_NAME (decl),
-			       build_reference_type (type));
-
 	  /* Top-level qualifiers on the parameters are
 	     ignored for function types.  */
 	  type = cp_build_qualified_type (type, 0);
@@ -8261,7 +8254,7 @@ grokparms (cp_parameter_declarator *first_parm, tree *parms)
 	    }
 
 	  if (!any_error && init)
-	    init = check_default_argument (type, init);
+	    init = check_default_argument (decl, init);
 	  else
 	    init = NULL_TREE;
 	}