From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-393405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 27345 invoked by alias); 1 Jun 2012 12:29:40 -0000
Received: (qmail 27335 invoked by uid 22791); 1 Jun 2012 12:29:39 -0000
X-SWARE-Spam-Status: No, hits=-4.3 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED
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; Fri, 01 Jun 2012 12:29:25 +0000
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/53550] [4.6/4.7/4.8 regression] ICE with -O{1,2,3} -fprefetch-loop-arrays in build2_stat, at tree.c:3803
Date: Fri, 01 Jun 2012 12:29:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.6.4
X-Bugzilla-Changed-Fields:
Message-ID: <bug-53550-4-atK4P99loX@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-53550-4@http.gcc.gnu.org/bugzilla/>
References: <bug-53550-4@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
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: 2012-06/txt/msg00032.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53550

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-06-01 12:29:11 UTC ---
I'd think
--- tree-ssa-loop-niter.c.jj    2012-05-30 14:38:55.000000000 +0200
+++ tree-ssa-loop-niter.c    2012-06-01 14:27:43.202456745 +0200
@@ -1276,13 +1276,14 @@ number_of_iterations_cond (struct loop *
      practice, but it is simple enough to manage.  */
   if (!integer_zerop (iv0->step) && !integer_zerop (iv1->step))
     {
+      tree step_type = POINTER_TYPE_P (type) ? sizetype : type;
       if (code != NE_EXPR)
     return false;

-      iv0->step = fold_binary_to_constant (MINUS_EXPR, type,
+      iv0->step = fold_binary_to_constant (MINUS_EXPR, step_type,
                        iv0->step, iv1->step);
       iv0->no_overflow = false;
-      iv1->step = build_int_cst (type, 0);
+      iv1->step = build_int_cst (step_type, 0);
       iv1->no_overflow = true;
     }
would match what tree-chrec.c is doing.