https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108992
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7)
> (In reply to Nikita Kniazev from comment #6)
> > The duplication happens even if I make cond int and compare with any other
> > value
> >
> > void use(int *);
> > void use2(int *);
> >
> > void foo(int * p, int cond)
> > {
> > if (cond == 789) {
> > use(p);
> > }
> > use2(p);
> > }
>
> Yes and no, Yes it does in GCC 7/8 but starting in GCC 9 there is not.
> GCC before GCC 10.x is no longer supported so there is not much we can do
> there.
Well actually I was wrong, the duplication is there but you can see why GCC
does the code duplication really. To also do shrink wrapping.
That is GCC 9+ does not need to setup a stack frame for the != 789 case and
just tail call to use2.
