optimization/7799: [3.2/3.3 regression] Loop bug with optimization flag -Os in gcc

[Christian Ehrhardt]

On Fri, Dec 13, 2002 at 01:57:56PM +0000, Andrew Haley wrote:
> Christian Ehrhardt writes:
>  > void fill (int* p, int* q[10])
>  > [ ... ]
>  > If p is initially 0x7ffffffc the comparison must be treated as unsigned,
>  > however, if p is initially 0xfffffffc the comparison must be treated as
>  > signed.
> 
> How can p be initially 0xfffffffc ?

By calling fill ((int*) 0xffffffc, q);

> The only way you could get such an address is to cast an int to a
> pointer, in which case it's your responsibility to make sure the
> address is valid.

I think you missed the point. The memory pointed to by p is never
accessed.

       regards   Christian

-- 
THAT'S ALL FOLKS!