* 91893 Orsay, France
*/
+#include <isl_ctx_private.h>
#include <isl_map_private.h>
#include <isl_local_space_private.h>
#include <isl_dim_private.h>
__isl_give isl_local_space *isl_local_space_dup(__isl_keep isl_local_space *ls)
{
- isl_local_space *dup;
-
if (!ls)
return NULL;
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;
+
+ if (!isl_local_space_divs_known(ls1))
+ return 0;
+ if (!isl_local_space_divs_known(ls2))
+ return 0;
+
+ 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)
{
isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
"index out of bounds", return NULL);
+ if (isl_int_is_zero(ls->div->row[pos][0]))
+ isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
+ "expression of div unknown", return NULL);
+
bmap = isl_basic_map_from_local_space(isl_local_space_copy(ls));
return isl_basic_map_div(bmap, pos);
}
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)
{
isl_local_space_free(ls);
return NULL;
}
+
+/* Copy row "s" of "src" to row "d" of "dst", applying the expansion
+ * defined by "exp".
+ */
+static void expand_row(__isl_keep isl_mat *dst, int d,
+ __isl_keep isl_mat *src, int s, int *exp)
+{
+ int i;
+ unsigned c = src->n_col - src->n_row;
+
+ isl_seq_cpy(dst->row[d], src->row[s], c);
+ isl_seq_clr(dst->row[d] + c, dst->n_col - c);
+
+ for (i = 0; i < s; ++i)
+ isl_int_set(dst->row[d][c + exp[i]], src->row[s][c + i]);
+}
+
+/* Compare (known) divs.
+ * Return non-zero if at least one of the two divs is unknown.
+ */
+static int cmp_row(__isl_keep isl_mat *div, int i, int j)
+{
+ int li, lj;
+
+ if (isl_int_is_zero(div->row[j][0]))
+ return -1;
+ if (isl_int_is_zero(div->row[i][0]))
+ return 1;
+
+ li = isl_seq_last_non_zero(div->row[i], div->n_col);
+ lj = isl_seq_last_non_zero(div->row[j], div->n_col);
+
+ if (li != lj)
+ return li - lj;
+
+ return isl_seq_cmp(div->row[i], div->row[j], div->n_col);
+}
+
+/* Combine the two lists of divs into a single list.
+ * For each row i in div1, exp1[i] is set to the position of the corresponding
+ * row in the result. Similarly for div2 and exp2.
+ * This function guarantees
+ * exp1[i] >= i
+ * exp1[i+1] > exp1[i]
+ * For optimal merging, the two input list should have been sorted.
+ */
+__isl_give isl_mat *isl_merge_divs(__isl_keep isl_mat *div1,
+ __isl_keep isl_mat *div2, int *exp1, int *exp2)
+{
+ int i, j, k;
+ isl_mat *div = NULL;
+ unsigned d = div1->n_col - div1->n_row;
+
+ div = isl_mat_alloc(div1->ctx, 1 + div1->n_row + div2->n_row,
+ d + div1->n_row + div2->n_row);
+ if (!div)
+ return NULL;
+
+ for (i = 0, j = 0, k = 0; i < div1->n_row && j < div2->n_row; ++k) {
+ int cmp;
+
+ expand_row(div, k, div1, i, exp1);
+ expand_row(div, k + 1, div2, j, exp2);
+
+ cmp = cmp_row(div, k, k + 1);
+ if (cmp == 0) {
+ exp1[i++] = k;
+ exp2[j++] = k;
+ } else if (cmp < 0) {
+ exp1[i++] = k;
+ } else {
+ exp2[j++] = k;
+ isl_seq_cpy(div->row[k], div->row[k + 1], div->n_col);
+ }
+ }
+ for (; i < div1->n_row; ++i, ++k) {
+ expand_row(div, k, div1, i, exp1);
+ exp1[i] = k;
+ }
+ for (; j < div2->n_row; ++j, ++k) {
+ expand_row(div, k, div2, j, exp2);
+ exp2[j] = k;
+ }
+
+ div->n_row = k;
+ div->n_col = d + k;
+
+ return div;
+}
+
+int isl_local_space_divs_known(__isl_keep isl_local_space *ls)
+{
+ int i;
+
+ if (!ls)
+ return -1;
+
+ for (i = 0; i < ls->div->n_row; ++i)
+ if (isl_int_is_zero(ls->div->row[i][0]))
+ return 0;
+
+ 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_dims(
+ __isl_take isl_local_space *ls, enum isl_dim_type type, unsigned n)
+{
+ int pos;
+
+ if (!ls)
+ return NULL;
+ pos = isl_local_space_dim(ls, type);
+ return isl_local_space_insert_dims(ls, type, pos, n);
+}
+
+/* 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;
+}
+
+int isl_local_space_is_named_or_nested(__isl_keep isl_local_space *ls,
+ enum isl_dim_type type)
+{
+ if (!ls)
+ return -1;
+ return isl_dim_is_named_or_nested(ls->dim, type);
+}
+
+__isl_give isl_local_space *isl_local_space_drop_dims(
+ __isl_take isl_local_space *ls,
+ enum isl_dim_type type, unsigned first, unsigned n)
+{
+ isl_ctx *ctx;
+
+ if (!ls)
+ return NULL;
+ if (n == 0 && !isl_local_space_is_named_or_nested(ls, type))
+ return ls;
+
+ ctx = isl_local_space_get_ctx(ls);
+ if (first + n > isl_local_space_dim(ls, type))
+ isl_die(ctx, isl_error_invalid, "range out of bounds",
+ return isl_local_space_free(ls));
+
+ ls = isl_local_space_cow(ls);
+ if (!ls)
+ return NULL;
+
+ if (type == isl_dim_div) {
+ ls->div = isl_mat_drop_rows(ls->div, first, n);
+ } else {
+ ls->dim = isl_dim_drop(ls->dim, type, first, n);
+ if (!ls->dim)
+ return isl_local_space_free(ls);
+ }
+
+ first += 1 + isl_local_space_offset(ls, type);
+ ls->div = isl_mat_drop_cols(ls->div, first, n);
+ if (!ls->div)
+ return isl_local_space_free(ls);
+
+ return ls;
+}
+
+__isl_give isl_local_space *isl_local_space_insert_dims(
+ __isl_take isl_local_space *ls,
+ enum isl_dim_type type, unsigned first, unsigned n)
+{
+ isl_ctx *ctx;
+
+ if (!ls)
+ return NULL;
+ if (n == 0 && !isl_local_space_is_named_or_nested(ls, type))
+ return ls;
+
+ ctx = isl_local_space_get_ctx(ls);
+ if (first > isl_local_space_dim(ls, type))
+ isl_die(ctx, isl_error_invalid, "position out of bounds",
+ return isl_local_space_free(ls));
+
+ ls = isl_local_space_cow(ls);
+ if (!ls)
+ return NULL;
+
+ if (type == isl_dim_div) {
+ ls->div = isl_mat_insert_zero_rows(ls->div, first, n);
+ } else {
+ ls->dim = isl_dim_insert(ls->dim, type, first, n);
+ if (!ls->dim)
+ return isl_local_space_free(ls);
+ }
+
+ first += 1 + isl_local_space_offset(ls, type);
+ ls->div = isl_mat_insert_zero_cols(ls->div, first, n);
+ if (!ls->div)
+ return isl_local_space_free(ls);
+
+ return ls;
+}
projects / platform / upstream / isl.git / blobdiff