From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14974 invoked by alias); 20 Dec 2004 01:55:48 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 14938 invoked by uid 48); 20 Dec 2004 01:55:42 -0000 Date: Mon, 20 Dec 2004 01:55:00 -0000 Message-ID: <20041220015542.14937.qmail@sourceware.org> From: "hp at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20041128144007.18701.hp@gcc.gnu.org> References: <20041128144007.18701.hp@gcc.gnu.org> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug target/18701] [4.0 regression] mmix-knuth-mmixware gcc.c-torture/execute failures: 20010224-1.c, 20020216-1.c, 20040218-1.c, 20040709-2.c X-Bugzilla-Reason: CC X-SW-Source: 2004-12/txt/msg02821.txt.bz2 List-Id: ------- Additional Comments From hp at gcc dot gnu dot org 2004-12-20 01:55 ------- Combine changes: (insn 13 12 15 0 (set (reg:HI 273) (mem:HI (plus:DI (reg/v/f:DI 269 [ y ]) (const_int 2 [0x2])) [3 S2 A16])) 1 {movhi} (nil) (expr_list:REG_DEAD (reg/v/f:DI 269 [ y ]) (nil))) (insn 15 13 16 0 (set (reg:DI 275) (plus:DI (reg:DI 272) (subreg:DI (reg:HI 273) 0))) 7 {adddi3} (insn_list:REG_DEP_TRUE 12 (insn_list:REG_DEP_TRUE 13 (nil))) (expr_list:REG_DEAD (reg:DI 272) (expr_list:REG_DEAD (reg:HI 273) (nil)))) into: (insn 15 13 16 0 (set (reg:DI 275) (plus:DI (reg:DI 272) (subreg:DI (mem:HI (plus:DI (reg/v/f:DI 269 [ y ]) (const_int 2 [0x2])) [3 S2 A16]) 0))) 7 {adddi3} (insn_list:REG_DEP_TRUE 12 (nil)) (expr_list:REG_DEAD (reg/v/f:DI 269 [ y ]) (expr_list:REG_DEAD (reg:DI 272) (nil)))) which is already wrong because the address isn't valid in DImode (STRICT_ALIGNMENT). Likely a paradoxical subregs issue; they're allowed if !INSN_SCHEDULING. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18701