On Fri, Sep 02, 2016 at 03:51:49PM +0000, Bernd Edlinger wrote:
> Hi,
>
> > + r += !a == ~b;
> > + r += !a == ~(int) b;
>
> I don't understand why ~b should not be warned at -Wall.
Yeah, there was an RFE for this but I'm not finding it.
> Frankly I don't even understand why the above statements are
> completely optimized away.
>
> r += !a == ~b;
> is optimized away, but
>
> b = ~b;
> r += !a == b;
>
> Is not. Why?
Something in ccp I suppose. But I didn't investigate closely because
it's not really relevant to this patch, sorry.
Marek
