From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-336391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 18145 invoked by alias); 9 Nov 2010 15:20:59 -0000
Received: (qmail 18133 invoked by uid 22791); 9 Nov 2010 15:20:58 -0000
X-SWARE-Spam-Status: No, hits=-2.8 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 09 Nov 2010 15:20:54 +0000
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/46387] [4.6 Regression] ICE in add_stores, at var-tracking.c:5415
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.6.0
X-Bugzilla-Changed-Fields:
Message-ID: <bug-46387-4-ycBZARd1JD@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-46387-4@http.gcc.gnu.org/bugzilla/>
References: <bug-46387-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Date: Tue, 09 Nov 2010 15:20:00 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2010-11/txt/msg01124.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46387

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-09 15:20:47 UTC ---
The interesting insns here are:

(insn:TI 70 272 60 5 (set (reg:BI 262 p6 [394])
        (ge:BI (reg:SI 16 r16 [orig:347 prephitmp.13 ] [347])
            (const_int 0 [0]))) pr46387.c:21 318 {*cmpsi_adjusted}
     (nil))

(insn 60 70 271 5 (set (mem/c/i:SI (reg/f:DI 32 r33 [409]) [2 x+0 S4 A64])
        (reg:SI 16 r16 [380])) pr46387.c:19 4 {movsi_internal}
     (nil))
...
(insn:TI 75 270 251 5 (cond_exec (eq (reg:BI 262 p6 [394])
            (const_int 0 [0]))
        (set (mem/c/i:SI (reg/f:DI 32 r33 [409]) [2 x+0 S4 A64])
            (const_int 0 [0]))) pr46387.c:22 813 {*p movsi_internal}
     (nil))
...
(insn 57 65 253 5 (set (reg:SI 14 r14 [orig:347 prephitmp.13 ] [347])
        (reg:SI 16 r16 [380])) pr46387.c:19 4 {movsi_internal}
     (expr_list:REG_DEAD (reg:SI 16 r16 [380])
        (nil)))
...
(insn 4 140 254 5 (cond_exec (eq (reg:BI 262 p6 [394])
            (const_int 0 [0]))
        (set (reg:SI 14 r14 [orig:347 prephitmp.13 ] [347])
            (const_int 0 [0]))) pr46387.c:22 813 {*p movsi_internal}
     (nil))

We use the same VALUE for r14 in insn 4 as for (if_then_else (eq (p6) (0)) (0)
(r14)).