Re: [Tinycc-devel] [PATCH] tccgen.c: Optimise 0<<x, 0>>x, -1>>x, x&0, x*0, x|-1, x%1.

[Sergey Korshunoff]

> > +            if (l2 == 1)
> > +                memset(&vtop->c, 0, sizeof(vtop->c));
>
> What this means?

> It's a valid alternative to writing something like:
>    if (t1 == VT_LLONG)
>        vtop->c.ll = 0;
>    else if (vtop->type.t & VT_UNSIGNED)
>        vtop->c.ui = 0;
>    else
>        vtop->c.i = 0;

> Why not to use  "vtop->c.ll = 0;" insteed of  "memset(&vtop->c, 0,
> sizeof(vtop->c));" ?

> Because I like to write correct C.

On which archs "sizeof(long long) < sizeof(int)" ?