Re: [Tinycc-devel] Isolated bug

[Rob Landley]

On Saturday 12 May 2007 8:47 pm, Daniel Glöckner wrote:
> On Sat, May 12, 2007 at 06:46:55PM -0400, Rob Landley wrote:
> > I added it to http://landley.net/code/tinycc/bugs and may take a stab at 
> > tracking it down over the weekend if somebody doesn't beat me to it. :)
> 
> You are collecting bugs?
> 
> Here is a short one:
> 
> On Mon, Apr 11, 2005 at 12:29:11AM +0200, Daniel Glöckner wrote:
> > int f(int *x)
> > {
> >   asm("xorl %0,%0":"=r"(*x));
> > }

I'm collecting short programs that _demonstrate_ a bug, either via a build 
break or via output when you run 'em that differs from gcc.

I'd also like to collect fixes, eventually. :)

Perhaps this, maybe?

#include <stdio.h>

int f(int *x)
{
  asm("xorl %0,%0":"=r"(*x));
  return *x;
}

int main(int argc, char *argv[])
{
  int a;

  printf("%d\n",f(&a));
  return 0;
}


Rob