J M Sharath Bharadwaj bharadwaj wrote:
> hi Andrew,
>
> I was talking about warning option called -Wuninitialized
> Here in the below code, compiler gives warning like " might be used
> uninitialized in this function" for x ,
> {
> int x;
> switch (y)
> {
> case 1: x = 1;
> break;
> case 2: x = 4;
> break;
> case 3: x = 5;
> }
> foo (x);
> }
>
> If the value code{y} is always 1, 2 or 3, then code{x} is
> always initialized, but GCC doesn't know this. So it emits a warning.
>
> My question was, if I am going to initialize the variable x to some
> value. is that going to help for the compiler to perform better
> optimization, without giving ant warnings
Probably not. As Robert William Fuller said, use a default case.
Andrew.
