alloc_reg_obtain
struct regional* region = alloc_reg_obtain(env->alloc);
region = alloc_reg_obtain(env->alloc);
struct regional* alloc_reg_obtain(struct alloc_cache* alloc);
struct regional* region = alloc_reg_obtain(env->alloc);
region = alloc_reg_obtain(env->alloc);
struct regional* alloc_reg_obtain(struct alloc_cache* alloc);