https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122018
--- Comment #7 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to uis from comment #5)
> I posted code that probably would be easier for optimizer, more common
> pattern I think would be
>
> #include <stdbool.h>
> void g();
> void h();
> int f(int a, int b) {
> if(a & (1 << b)) {
> g();
> a = a | (1 << b);
> } else
> h();
> return a;
> }
For this one, bts in the if BB and could be not executed. replaced bt with bts
may encounter overhead of register pressure.
