Hi,

 > +  r += !a == ~b;
 > +  r += !a == ~(int) b;

I don't understand why ~b should not be warned at -Wall.

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?



Bernd.

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