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Mail Archives: djgpp/2001/02/28/10:51:29

From: "Alexei A. Frounze" <dummy_addressee AT hotmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: bug
Date: Wed, 28 Feb 2001 10:40:12 -0500
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References: <3A9CFB23 DOT 86C6D3EF AT sci DOT kun DOT nl>
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

how do you compile that mess?

--
Alexei A. Frounze
alexfru [AT] chat [DOT] ru
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"Michiel de Bondt" <michielb AT sci DOT kun DOT nl> wrote in message
news:3A9CFB23 DOT 86C6D3EF AT sci DOT kun DOT nl...
> Hello djgpp-ers,
>
> I think I found a bug in gcc. But first, I had to mail the bug to this
> newsgroup. gcc allocates an occupied register for a computation. I made
> the following small sample file of the problem. You should cancel
> optimization, otherwise the problem does not occur due to removal of
> code.
>
> Best regard, Michiel de Bondt
>
>
>
>


----------------------------------------------------------------------------
----


> // do not use optimization
>
> union intel
> {
>   long e;
>   short x;
>   struct {
>     char l;
>     char h;
>   } b;
> };
>
> int main ()
> {
>   register union intel a __asm__ ("%eax");
>   register union intel b __asm__ ("%ebx");
>   register union intel c __asm__ ("%ecx");
>   register union intel d __asm__ ("%edx");
>   b.b.l++;
> }
>


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