From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26680 invoked by alias); 5 Jul 2010 18:44:08 -0000 Received: (qmail 26280 invoked by uid 48); 5 Jul 2010 18:43:41 -0000 Date: Mon, 05 Jul 2010 18:44:00 -0000 Message-ID: <20100705184341.26279.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/41355] Type of ADDR_EXPR in CALL_EXPR not rebuilt when function is cloned In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "baldrick at gcc dot gnu dot org" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2010-07/txt/msg00488.txt.bz2 ------- Comment #1 from baldrick at gcc dot gnu dot org 2010-07-05 18:43 ------- It turns out that the problem is that when build_function_type_skip_args creates the new type, TYPE_POINTER_TO for the new type is still pointing to the old type. When gimple_call_set_fndecl is used to change the fndecl to one with less arguments, an ADDR_EXPR is built. The type of the ADDR_EXPR is obtained from the TYPE_POINTER_TO field of the new type, and thus has type pointer-to-old-type rather than pointer-to-new-type. I'm testing the following patch. The idea here is that calling copy_node has no advantage. In spite of the comment, build_distinct_type_copy preserves attributes etc too, so it might as well be used always. [I think the comment refers to some earlier logic, since the change introducing build_distinct_type_copy post-dates it]. Index: gcc-4.5/gcc/tree.c =================================================================== --- gcc-4.5.orig/gcc/tree.c 2010-07-05 20:26:21.349376337 +0200 +++ gcc-4.5/gcc/tree.c 2010-07-05 20:29:11.582730610 +0200 @@ -7208,24 +7208,10 @@ new_reversed = void_list_node; } - /* Use copy_node to preserve as much as possible from original type - (debug info, attribute lists etc.) - Exception is METHOD_TYPEs must have THIS argument. - When we are asked to remove it, we need to build new FUNCTION_TYPE - instead. */ - if (TREE_CODE (orig_type) != METHOD_TYPE - || !bitmap_bit_p (args_to_skip, 0)) - { - new_type = copy_node (orig_type); - TYPE_ARG_TYPES (new_type) = new_reversed; - } - else - { - new_type - = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type), - new_reversed)); - TYPE_CONTEXT (new_type) = TYPE_CONTEXT (orig_type); - } + new_type + = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type), + new_reversed)); + TYPE_CONTEXT (new_type) = TYPE_CONTEXT (orig_type); /* This is a new type, not a copy of an old type. Need to reassociate variants. We can handle everything except the main variant lazily. */ -- baldrick at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2010-07-05 18:43:39 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41355