From: "(see below)" <yaldnif.w@blueyonder.co.uk>
Subject: Re: GNAT GPL 2009 for Mac OS X (Snow Leopard)
Date: Wed, 23 Dec 2009 03:29:14 +0000
Date: 2009-12-23T03:29:14+00:00 [thread overview]
Message-ID: <C7573F0A.12F81C%yaldnif.w@blueyonder.co.uk> (raw)
In-Reply-To: 96854a61-2032-49b1-a8b2-8a5aee181701@22g2000yqr.googlegroups.com
On 22/12/2009 23:37, in article
96854a61-2032-49b1-a8b2-8a5aee181701@22g2000yqr.googlegroups.com, "sjw"
<simon.j.wright@mac.com> wrote:
> Have just uploaded gnat-gpl-2009-i386-apple-darwin10.2.0-1.tar.bz2,
> without the dependency; will remove the offending files after a day or
> two.
Unfortunately, it goes very badly wrong at -O1 optimization level on another
example:
----------------------------------------------------------------------------
package test is
type i64 is mod 2**64;
for i64'Size use 64;
subtype a_virtual_address is i64;
subtype an_offset is a_virtual_address;
function fetch_byte_from (
location : i64;
position : an_offset )
return i64;
end test;
--
package body test is
type i08 is mod 2**8;
for i08'Size use 8;
type an_i08_array is array (a_virtual_address range <>) of i08;
for an_i08_array'Component_Size use i08'Size;
type an_i08_group is new an_i08_array (0..7);
for an_i08_group'Size use i64'Size;
pragma Convention (C, an_i08_group);
function fetch_byte_from (
location : i64;
position : an_offset )
return i64 is
the_location_as_i08s : an_i08_group;
for the_location_as_i08s'Address use location'Address;
pragma Import (Ada, the_location_as_i08s);
begin
return i64(the_location_as_i08s
((position and 2#111#) xor 2#111#));
end fetch_byte_from;
end test;
----------------------------------------------------------------------------
thus:
+===========================GNAT BUG DETECTED==============================+
| GPL 2009 (20090519) (i386-apple-darwin10.2.0) GCC error: |
| in gnat_to_gnu_entity, at ada/gcc-interface/decl.c:312 |
| Error detected at test.adb:14:7 |
...
This error message does not appear at -O3, but the generated object program
is non-functional, although that may be for a different reason, of course.
This code compiled and ran correctly under the Leopard compilers I was using
until I stupidly installed SL.
What on earth has happened for GNAT to regress so badly in the face of what
is often described as a tidying-up and performance release of OS X?
--
Bill Findlay
<surname><forename> chez blueyonder.co.uk
next prev parent reply other threads:[~2009-12-23 3:29 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-22 12:09 GNAT GPL 2009 for Mac OS X (Snow Leopard) sjw
2009-12-22 14:23 ` (see below)
2009-12-22 17:10 ` sjw
2009-12-22 17:46 ` (see below)
2009-12-22 21:52 ` sjw
2009-12-22 23:37 ` sjw
2009-12-23 3:29 ` (see below) [this message]
2009-12-23 14:26 ` sjw
2009-12-23 17:18 ` (see below)
2009-12-23 23:44 ` sjw
2009-12-24 0:01 ` (see below)
2009-12-24 14:50 ` sjw
2009-12-24 15:31 ` John B. Matthews
2009-12-24 17:24 ` sjw
2009-12-24 19:20 ` (see below)
2009-12-25 4:30 ` (see below)
2009-12-25 17:59 ` sjw
2009-12-25 17:32 ` sjw
2009-12-26 0:54 ` (see below)
2009-12-23 21:16 ` Jerry
2009-12-23 23:38 ` sjw
2009-12-23 0:08 ` (see below)
2009-12-23 13:48 ` Georg Bauhaus
2009-12-23 17:21 ` (see below)
2009-12-24 15:01 ` sjw
2009-12-30 3:12 ` Jerry
2009-12-30 14:46 ` sjw
2009-12-25 17:52 ` sjw
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