From: Keith Owens <kaos@melbourne.sgi.com>
To: Kjeld Borch Egevang <kjelde@mips.com>
Cc: linux-mips mailing list <linux-mips@oss.sgi.com>
Subject: Re: gcc crash
Date: Fri, 28 Sep 2001 22:37:52 +1000 [thread overview]
Message-ID: <19900.1001680672@ocs3.intra.ocs.com.au> (raw)
In-Reply-To: Your message of "Thu, 27 Sep 2001 16:59:47 +0200." <Pine.LNX.4.30.0109271657250.1742-100000@coplin19.mips.com>
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.
next prev parent reply other threads:[~2001-09-28 12:38 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 [this message]
2001-09-28 17:05 ` Ralf Baechle
2001-09-29 8:35 ` H . J . Lu
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