subprog_name
const char *sub_name = subprog_name(env, subprog);
i, subprog_name(env, i));
subprog_name(env, cur),
subprog_name(env, callee));
i, subprog_name(env, env->subprog_topo_order[i]));
const char *sub_name = subprog_name(env, subprog);
const char *subprog_name, int arg_idx,
prog->name, subprog_name, arg_idx, ctx_name);