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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/26797] [4.2 Regression] ACATS c35507m cd2a23e cxh1001 failures
Date: Mon, 27 Mar 2006 20:31:00 -0000 [thread overview]
Message-ID: <20060327203152.9238.qmail@sourceware.org> (raw)
In-Reply-To: <bug-26797-7210@http.gcc.gnu.org/bugzilla/>
------- Comment #7 from law at redhat dot com 2006-03-27 20:31 -------
Subject: Re: [4.2 Regression] ACATS c35507m
cd2a23e cxh1001 failures
On Mon, 2006-03-27 at 20:12 +0000, laurent at guerby dot net wrote:
>
> I don't know how it goes through gigi and the BE but the check
>
> system__unsigned_types__unsigned!(A) in 4 .. 5
>
> must not go away. May be the front-end is wrong in using function c35507m__char
> as input type for the parameter though.
And this is the heart of why I'm not a fan of Ada's type
representation. We have an object, A with a defined type
which only allows the values 4 & 5. However, we have a
program which effectively demands that we put the value 3
into A.
VRP is doing exactly what it should be doing with the code it's
being presented. Ada needs to either pass A in a different
type, or use some other kind of conversion mechanism which
doesn't allow VRP to propagate range information from the
parameter. I've never looked closely, but VIEW_CONVERT_EXPR
may be what you want rather than a NOP_EXPR or CONVERT_EXPR.
jeff
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26797
next prev parent reply other threads:[~2006-03-27 20:31 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-22 7:29 [Bug ada/26797] New: [4.2 Regression] ACATS c35507m cd2a23e cxh1001 wrong code laurent at guerby dot net
2006-03-22 10:33 ` [Bug ada/26797] " ebotcazou at gcc dot gnu dot org
2006-03-22 18:48 ` [Bug ada/26797] [4.2 Regression] ACATS c35507m cd2a23e cxh1001 failures ebotcazou at gcc dot gnu dot org
2006-03-22 21:08 ` pinskia at gcc dot gnu dot org
2006-03-23 13:19 ` [Bug tree-optimization/26797] " baldrick at free dot fr
2006-03-27 17:09 ` law at redhat dot com
2006-03-27 17:23 ` law at redhat dot com
2006-03-27 20:12 ` laurent at guerby dot net
2006-03-27 20:31 ` law at redhat dot com [this message]
2006-03-28 3:56 ` kenner at vlsi1 dot ultra dot nyu dot edu
2006-03-28 15:01 ` law at redhat dot com
2006-03-28 15:33 ` law at redhat dot com
2006-03-30 7:58 ` ebotcazou at gcc dot gnu dot org
2006-03-30 8:25 ` ebotcazou at gcc dot gnu dot org
2006-03-30 8:32 ` ebotcazou at gcc dot gnu dot org
2006-03-30 12:13 ` kenner at vlsi1 dot ultra dot nyu dot edu
2006-04-21 23:40 ` [Bug tree-optimization/26797] [4.2 Regression] ACATS c35507m cd2a23e cxh1001 fail pinskia at gcc dot gnu dot org
2006-04-21 23:41 ` pinskia at gcc dot gnu dot org
2006-04-21 23:41 ` pinskia at gcc dot gnu dot org
2006-06-04 8:27 ` christian dot joensson at gmail dot com
2006-06-04 18:19 ` mmitchel at gcc dot gnu dot org
2006-06-26 23:41 ` laurent at guerby dot net
2006-06-27 3:05 ` kenner at vlsi1 dot ultra dot nyu dot edu
2006-10-29 23:17 ` [Bug ada/26797] [4.2/4.3 regression] " ebotcazou at gcc dot gnu dot org
2006-10-30 9:04 ` law at redhat dot com
2006-10-30 9:21 ` ebotcazou at gcc dot gnu dot org
2007-03-04 10:06 ` ebotcazou at gcc dot gnu dot org
2007-03-04 10:08 ` [Bug ada/26797] [4.3 regression] ACATS " ebotcazou at gcc dot gnu dot org
2007-03-08 9:57 ` [Bug ada/26797] [4.3 regression] ACATS cxh1001 fails baldrick at gcc dot gnu dot org
2007-03-08 12:54 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-08 16:06 ` baldrick at free dot fr
2007-03-08 16:52 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-09 10:41 ` baldrick at free dot fr
2007-03-09 11:11 ` rguenth at gcc dot gnu dot org
2007-03-09 11:19 ` ebotcazou at gcc dot gnu dot org
2007-03-09 11:35 ` baldrick at free dot fr
2007-03-09 11:50 ` baldrick at free dot fr
2007-03-09 13:59 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-09 14:19 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-09 14:29 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-09 22:44 ` baldrick at free dot fr
2007-03-09 23:10 ` baldrick at free dot fr
2007-03-09 23:13 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-09 23:41 ` baldrick at free dot fr
2007-03-10 0:17 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-03-10 16:52 ` ebotcazou at gcc dot gnu dot org
2007-03-13 10:30 ` baldrick at free dot fr
2007-03-13 12:34 ` kenner at vlsi1 dot ultra dot nyu dot edu
2007-09-12 15:53 ` ebotcazou at gcc dot gnu dot org
2007-09-12 15:55 ` ebotcazou at gcc dot gnu dot org
2007-09-15 6:35 ` law at redhat dot com
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