* 91893 Orsay, France
*/
+#include <isl_ctx_private.h>
#include <isl_map_private.h>
#include <isl_local_space_private.h>
#include <isl_dim_private.h>
return NULL;
}
+/* Return true if the two local spaces are identical, with identical
+ * expressions for the integer divisions.
+ */
+int isl_local_space_is_equal(__isl_keep isl_local_space *ls1,
+ __isl_keep isl_local_space *ls2)
+{
+ int equal;
+
+ if (!ls1 || !ls2)
+ return -1;
+
+ equal = isl_dim_equal(ls1->dim, ls2->dim);
+ if (equal < 0 || !equal)
+ return equal;
+
+ return isl_mat_is_equal(ls1->div, ls2->div);
+}
+
int isl_local_space_dim(__isl_keep isl_local_space *ls,
enum isl_dim_type type)
{
return isl_dim_copy(ls->dim);
}
+__isl_give isl_local_space *isl_local_space_set_dim_name(
+ __isl_take isl_local_space *ls,
+ enum isl_dim_type type, unsigned pos, const char *s)
+{
+ ls = isl_local_space_cow(ls);
+ if (!ls)
+ return NULL;
+ ls->dim = isl_dim_set_name(ls->dim, type, pos, s);
+ if (!ls->dim)
+ return isl_local_space_free(ls);
+
+ return ls;
+}
+
__isl_give isl_local_space *isl_local_space_add_div(
__isl_take isl_local_space *ls, __isl_take isl_vec *div)
{
return 1;
}
+
+/* Construct a local space for a map that has the given local
+ * space as domain and that has a zero-dimensional range.
+ */
+__isl_give isl_local_space *isl_local_space_from_domain(
+ __isl_take isl_local_space *ls)
+{
+ ls = isl_local_space_cow(ls);
+ if (!ls)
+ return NULL;
+ ls->dim = isl_dim_from_domain(ls->dim);
+ if (!ls->dim)
+ return isl_local_space_free(ls);
+ return ls;
+}
+
+__isl_give isl_local_space *isl_local_space_add_dim(
+ __isl_take isl_local_space *ls, enum isl_dim_type type, unsigned n)
+{
+ int pos;
+
+ if (n == 0)
+ return ls;
+
+ ls = isl_local_space_cow(ls);
+ if (!ls)
+ return NULL;
+
+ pos = isl_local_space_offset(ls, type);
+ pos += isl_local_space_dim(ls, type);
+
+ ls->div = isl_mat_insert_zero_cols(ls->div, 1 + pos, n);
+
+ if (type == isl_dim_div) {
+ ls->div = isl_mat_add_zero_rows(ls->div, n);
+ } else {
+ ls->dim = isl_dim_add(ls->dim, type, n);
+ if (!ls->dim)
+ return isl_local_space_free(ls);
+ }
+
+ if (!ls->div)
+ return isl_local_space_free(ls);
+
+ return ls;
+}
+
+/* Remove common factor of non-constant terms and denominator.
+ */
+static void normalize_div(__isl_keep isl_local_space *ls, int div)
+{
+ isl_ctx *ctx = ls->div->ctx;
+ unsigned total = ls->div->n_col - 2;
+
+ isl_seq_gcd(ls->div->row[div] + 2, total, &ctx->normalize_gcd);
+ isl_int_gcd(ctx->normalize_gcd,
+ ctx->normalize_gcd, ls->div->row[div][0]);
+ if (isl_int_is_one(ctx->normalize_gcd))
+ return;
+
+ isl_seq_scale_down(ls->div->row[div] + 2, ls->div->row[div] + 2,
+ ctx->normalize_gcd, total);
+ isl_int_divexact(ls->div->row[div][0], ls->div->row[div][0],
+ ctx->normalize_gcd);
+ isl_int_fdiv_q(ls->div->row[div][1], ls->div->row[div][1],
+ ctx->normalize_gcd);
+}
+
+/* Exploit the equalities in "eq" to simplify the expressions of
+ * the integer divisions in "ls".
+ * The integer divisions in "ls" are assumed to appear as regular
+ * dimensions in "eq".
+ */
+__isl_give isl_local_space *isl_local_space_substitute_equalities(
+ __isl_take isl_local_space *ls, __isl_take isl_basic_set *eq)
+{
+ int i, j, k;
+ unsigned total;
+ unsigned n_div;
+
+ ls = isl_local_space_cow(ls);
+ if (!ls || !eq)
+ goto error;
+
+ total = isl_dim_total(eq->dim);
+ if (isl_local_space_dim(ls, isl_dim_all) != total)
+ isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
+ "dimensions don't match", goto error);
+ total++;
+ n_div = eq->n_div;
+ for (i = 0; i < eq->n_eq; ++i) {
+ j = isl_seq_last_non_zero(eq->eq[i], total + n_div);
+ if (j < 0 || j == 0 || j >= total)
+ continue;
+
+ for (k = 0; k < ls->div->n_row; ++k) {
+ if (isl_int_is_zero(ls->div->row[k][1 + j]))
+ continue;
+ isl_seq_elim(ls->div->row[k] + 1, eq->eq[i], j, total,
+ &ls->div->row[k][0]);
+ normalize_div(ls, k);
+ }
+ }
+
+ isl_basic_set_free(eq);
+ return ls;
+error:
+ isl_basic_set_free(eq);
+ isl_local_space_free(ls);
+ return NULL;
+}