From: Ralf Baechle <ralf@oss.sgi.com>
To: Keith Owens <kaos@melbourne.sgi.com>
Cc: Kjeld Borch Egevang <kjelde@mips.com>,
linux-mips mailing list <linux-mips@oss.sgi.com>
Subject: Re: gcc crash
Date: Fri, 28 Sep 2001 19:05:38 +0200 [thread overview]
Message-ID: <20010928190538.B31094@dea.linux-mips.net> (raw)
In-Reply-To: <19900.1001680672@ocs3.intra.ocs.com.au>; from kaos@melbourne.sgi.com on Fri, Sep 28, 2001 at 10:37:52PM +1000
On Fri, Sep 28, 2001 at 10:37:52PM +1000, Keith Owens wrote:
> On Thu, 27 Sep 2001 16:59:47 +0200 (CEST),
> Kjeld Borch Egevang <kjelde@mips.com> wrote:
> >When I compile the following function with "gcc -O2" the compiler crashes.
> >static float sp_f2l(float x)
> >{
> > long l, *xl;
> > float y;
> >
> > xl = (void *)&y;
> > l = x;
> > *xl = l;
> > return y;
> >}
>
> You are breaking the C rules for data accesses. Compile with
> -fno-strict-aliasing if you want to break the rules. Or, and this is
> much better, use a union of long and float to "convert" one
> representation to another.
Yes said the compiler is crashing so that's definately a gcc bug. Aside
of course of the code itself being buggy also.
Ralf
next prev parent reply other threads:[~2001-09-28 17:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-27 14:59 gcc crash Kjeld Borch Egevang
2001-09-28 12:37 ` Keith Owens
2001-09-28 17:05 ` Ralf Baechle [this message]
2001-09-29 8:35 ` H . J . Lu
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