/* Merge "graft" into the last graft of "list".
* body points to the then or else branch of an if node in that last graft.
*
* We attach graft->node to this branch and update the enforced
* set of the last graft of "list" to take into account the enforced
* set of "graft".
*/
static __isl_give isl_ast_graft_list *graft_extend_body(
__isl_take isl_ast_graft_list *list,
__isl_keep isl_ast_node **body, __isl_take isl_ast_graft *graft,
__isl_keep isl_ast_build *build)
{
int n;
int depth;
isl_ast_graft *last;
isl_space *space;
isl_basic_set *enforced;
if (!list || !graft)
goto error;
extend_body(body, isl_ast_node_copy(graft->node));
if (!*body)
goto error;
n = isl_ast_graft_list_n_ast_graft(list);
last = isl_ast_graft_list_get_ast_graft(list, n - 1);
depth = isl_ast_build_get_depth(build);
space = isl_ast_build_get_space(build, 1);
enforced = isl_basic_set_empty(space);
enforced = update_enforced(enforced, last, depth);
enforced = update_enforced(enforced, graft, depth);
last = isl_ast_graft_set_enforced(last, enforced);
list = isl_ast_graft_list_set_ast_graft(list, n - 1, last);
isl_ast_graft_free(graft);
return list;
error:
isl_ast_graft_free(graft);
return isl_ast_graft_list_free(list);
}
__isl_give isl_basic_set *isl_basic_set_from_point(__isl_take isl_point *pnt)
{
isl_basic_set *bset;
isl_basic_set *model;
model = isl_basic_set_empty(isl_dim_copy(pnt->dim));
bset = isl_basic_set_from_vec(isl_vec_copy(pnt->vec));
bset = isl_basic_set_from_underlying_set(bset, model);
isl_point_free(pnt);
return bset;
}
/* Create a(n identity) morphism between empty sets of the same dimension
* a "bset".
*/
__isl_give isl_morph *isl_morph_empty(__isl_keep isl_basic_set *bset)
{
isl_mat *id;
isl_basic_set *empty;
unsigned total;
if (!bset)
return NULL;
total = isl_basic_set_total_dim(bset);
id = isl_mat_identity(bset->ctx, 1 + total);
empty = isl_basic_set_empty(isl_space_copy(bset->dim));
return isl_morph_alloc(empty, isl_basic_set_copy(empty),
id, isl_mat_copy(id));
}
__isl_give isl_basic_set *isl_basic_set_box_from_points(
__isl_take isl_point *pnt1, __isl_take isl_point *pnt2)
{
isl_basic_set *bset;
unsigned total;
int i;
int k;
isl_int t;
isl_int_init(t);
if (!pnt1 || !pnt2)
goto error;
isl_assert(pnt1->dim->ctx,
isl_dim_equal(pnt1->dim, pnt2->dim), goto error);
if (isl_point_is_void(pnt1) && isl_point_is_void(pnt2)) {
isl_dim *dim = isl_dim_copy(pnt1->dim);
isl_point_free(pnt1);
isl_point_free(pnt2);
isl_int_clear(t);
return isl_basic_set_empty(dim);
}
if (isl_point_is_void(pnt1)) {
isl_point_free(pnt1);
isl_int_clear(t);
return isl_basic_set_from_point(pnt2);
}
if (isl_point_is_void(pnt2)) {
isl_point_free(pnt2);
isl_int_clear(t);
return isl_basic_set_from_point(pnt1);
}
total = isl_dim_total(pnt1->dim);
bset = isl_basic_set_alloc_dim(isl_dim_copy(pnt1->dim), 0, 0, 2 * total);
for (i = 0; i < total; ++i) {
isl_int_mul(t, pnt1->vec->el[1 + i], pnt2->vec->el[0]);
isl_int_submul(t, pnt2->vec->el[1 + i], pnt1->vec->el[0]);
k = isl_basic_set_alloc_inequality(bset);
if (k < 0)
goto error;
isl_seq_clr(bset->ineq[k] + 1, total);
if (isl_int_is_pos(t)) {
isl_int_set_si(bset->ineq[k][1 + i], -1);
isl_int_set(bset->ineq[k][0], pnt1->vec->el[1 + i]);
} else {
isl_int_set_si(bset->ineq[k][1 + i], 1);
isl_int_neg(bset->ineq[k][0], pnt1->vec->el[1 + i]);
}
isl_int_fdiv_q(bset->ineq[k][0], bset->ineq[k][0], pnt1->vec->el[0]);
k = isl_basic_set_alloc_inequality(bset);
if (k < 0)
goto error;
isl_seq_clr(bset->ineq[k] + 1, total);
if (isl_int_is_pos(t)) {
isl_int_set_si(bset->ineq[k][1 + i], 1);
isl_int_neg(bset->ineq[k][0], pnt2->vec->el[1 + i]);
} else {
isl_int_set_si(bset->ineq[k][1 + i], -1);
isl_int_set(bset->ineq[k][0], pnt2->vec->el[1 + i]);
}
isl_int_fdiv_q(bset->ineq[k][0], bset->ineq[k][0], pnt2->vec->el[0]);
}
bset = isl_basic_set_finalize(bset);
isl_point_free(pnt1);
isl_point_free(pnt2);
isl_int_clear(t);
return bset;
error:
isl_point_free(pnt1);
isl_point_free(pnt2);
isl_int_clear(t);
return NULL;
}
