__isl_give isl_aff *isl_aff_set_coefficient(__isl_take isl_aff *aff,
enum isl_dim_type type, int pos, isl_int v);
__isl_give isl_aff *isl_aff_set_coefficient_si(__isl_take isl_aff *aff,
enum isl_dim_type type, int pos, int v);
__isl_give isl_aff *isl_aff_set_coefficient(__isl_take isl_aff *aff,
enum isl_dim_type type, int pos, isl_int v);
__isl_give isl_aff *isl_aff_set_coefficient_si(__isl_take isl_aff *aff,
enum isl_dim_type type, int pos, int v);