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Re: paranoia on PowerPC
- From: Tim Prince <n8tm at aol dot com>
- To: joel dot sherrill at oarcorp dot com
- Cc: GCC List <gcc at gcc dot gnu dot org>, Eric Norum <norume at aps dot anl dot gov>
- Date: Mon, 23 Jul 2007 19:00:06 -0700
- Subject: Re: paranoia on PowerPC
- References: <46A53192.email@example.com>
- Reply-to: tprince at computer dot org
In analyzing the output of paranoia, Eric Norum
and I have noticed that when compiled at
default optimization levels, the results
are reported to have a flaw. When compiled
with no optimization, paranoia reports no flaws.
I tried this with RTEMS running on psim using
gcc 4.2.1. RTEMS uses newlib.
Eric duplicated the problem on a PowerPC Mac
using gcc 4.0.1.
We believe this indicates an issue introduced
by gcc optimization.
Given the age of paranoia (the version included
with RTEMS is from Cygnus circa 1993), does this
sound familiar or is this a new issue?
Should we know which version of Paranoia this is? or guess which flaw
is reported? I'd be happy to check Paranoia on a platform to which I
have access, with a more interesting gcc version, but you've given
little to go on.