-O2 bug in gcc 3.2, 3.3 and 3.4 with 64 bit integers on x86

[Anders Torger]

Compiler makes same mistake, the only difference is the warning at 
compile time, which can be avoided with this casting trick:

return ((unsigned long *)(void *)&ull)[0] ^ 
  ((unsigned long *)(void *)&ull)[1];

/Anders

On Tuesday 09 November 2004 16.56, you wrote:
> Anders Torger <torger@ludd.luth.se> writes:
> > unsigned long
> > hash(void *key)
> > {
> >     unsigned long long ull;
> >     ull = *(unsigned long long *)key;
> >     return ((unsigned long *)&ull)[0] ^ ((unsigned long *)&ull)[1];
>
> Try -Wstrict-aliasing.
>
> Andreas.