branch_mode
int *branch_mode = opt->value;
*branch_mode = !unset;
int branch_mode = -1;
OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
if (((branch_mode == -1 && has_br_stack) || branch_mode == 1) &&
static const struct branch_mode branch_modes[] = {
const struct branch_mode *br;