| To: | Kjeld Borch Egevang <kjelde@mips.com> |
|---|---|
| Subject: | Re: gcc crash |
| From: | Keith Owens <kaos@melbourne.sgi.com> |
| Date: | Fri, 28 Sep 2001 22:37:52 +1000 |
| Cc: | linux-mips mailing list <linux-mips@oss.sgi.com> |
| In-reply-to: | Your message of "Thu, 27 Sep 2001 16:59:47 +0200." <Pine.LNX.4.30.0109271657250.1742-100000@coplin19.mips.com> |
| Sender: | owner-linux-mips@oss.sgi.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.
|
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