2 * Copyright 2011 INRIA Saclay
4 * Use of this software is governed by the GNU LGPLv2.1 license
6 * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
7 * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
11 #include <isl_map_private.h>
12 #include <isl_local_space_private.h>
13 #include <isl_dim_private.h>
14 #include <isl_mat_private.h>
17 isl_ctx *isl_local_space_get_ctx(__isl_keep isl_local_space *ls)
19 return ls ? ls->dim->ctx : NULL;
22 __isl_give isl_local_space *isl_local_space_alloc_div(__isl_take isl_dim *dim,
23 __isl_take isl_mat *div)
26 isl_local_space *ls = NULL;
31 ctx = isl_dim_get_ctx(dim);
32 ls = isl_calloc_type(ctx, struct isl_local_space);
43 isl_local_space_free(ls);
47 __isl_give isl_local_space *isl_local_space_alloc(__isl_take isl_dim *dim,
57 total = isl_dim_total(dim);
59 ctx = isl_dim_get_ctx(dim);
60 div = isl_mat_alloc(ctx, n_div, 1 + 1 + total + n_div);
61 return isl_local_space_alloc_div(dim, div);
64 __isl_give isl_local_space *isl_local_space_from_dim(__isl_take isl_dim *dim)
66 return isl_local_space_alloc(dim, 0);
69 __isl_give isl_local_space *isl_local_space_copy(__isl_keep isl_local_space *ls)
78 __isl_give isl_local_space *isl_local_space_dup(__isl_keep isl_local_space *ls)
83 return isl_local_space_alloc_div(isl_dim_copy(ls->dim),
84 isl_mat_copy(ls->div));
88 __isl_give isl_local_space *isl_local_space_cow(__isl_take isl_local_space *ls)
96 return isl_local_space_dup(ls);
99 void *isl_local_space_free(__isl_take isl_local_space *ls)
107 isl_dim_free(ls->dim);
108 isl_mat_free(ls->div);
115 /* Return true if the two local spaces are identical, with identical
116 * expressions for the integer divisions.
118 int isl_local_space_is_equal(__isl_keep isl_local_space *ls1,
119 __isl_keep isl_local_space *ls2)
126 equal = isl_dim_equal(ls1->dim, ls2->dim);
127 if (equal < 0 || !equal)
130 return isl_mat_is_equal(ls1->div, ls2->div);
133 int isl_local_space_dim(__isl_keep isl_local_space *ls,
134 enum isl_dim_type type)
138 if (type == isl_dim_div)
139 return ls->div->n_row;
140 if (type == isl_dim_all)
141 return isl_dim_size(ls->dim, isl_dim_all) + ls->div->n_row;
142 return isl_dim_size(ls->dim, type);
145 unsigned isl_local_space_offset(__isl_keep isl_local_space *ls,
146 enum isl_dim_type type)
155 case isl_dim_cst: return 0;
156 case isl_dim_param: return 1;
157 case isl_dim_in: return 1 + dim->nparam;
158 case isl_dim_out: return 1 + dim->nparam + dim->n_in;
159 case isl_dim_div: return 1 + dim->nparam + dim->n_in + dim->n_out;
164 const char *isl_local_space_get_dim_name(__isl_keep isl_local_space *ls,
165 enum isl_dim_type type, unsigned pos)
167 return ls ? isl_dim_get_name(ls->dim, type, pos) : NULL;
170 __isl_give isl_div *isl_local_space_get_div(__isl_keep isl_local_space *ls,
178 if (pos < 0 || pos >= ls->div->n_row)
179 isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
180 "index out of bounds", return NULL);
182 bmap = isl_basic_map_from_local_space(isl_local_space_copy(ls));
183 return isl_basic_map_div(bmap, pos);
186 __isl_give isl_dim *isl_local_space_get_dim(__isl_keep isl_local_space *ls)
191 return isl_dim_copy(ls->dim);
194 __isl_give isl_local_space *isl_local_space_add_div(
195 __isl_take isl_local_space *ls, __isl_take isl_vec *div)
197 ls = isl_local_space_cow(ls);
201 if (ls->div->n_col != div->size)
202 isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
203 "incompatible dimensions", goto error);
205 ls->div = isl_mat_add_zero_cols(ls->div, 1);
206 ls->div = isl_mat_add_rows(ls->div, 1);
210 isl_seq_cpy(ls->div->row[ls->div->n_row - 1], div->el, div->size);
211 isl_int_set_si(ls->div->row[ls->div->n_row - 1][div->size], 0);
216 isl_local_space_free(ls);
221 __isl_give isl_local_space *isl_local_space_replace_divs(
222 __isl_take isl_local_space *ls, __isl_take isl_mat *div)
224 ls = isl_local_space_cow(ls);
229 isl_mat_free(ls->div);
234 isl_local_space_free(ls);
238 /* Copy row "s" of "src" to row "d" of "dst", applying the expansion
241 static void expand_row(__isl_keep isl_mat *dst, int d,
242 __isl_keep isl_mat *src, int s, int *exp)
245 unsigned c = src->n_col - src->n_row;
247 isl_seq_cpy(dst->row[d], src->row[s], c);
248 isl_seq_clr(dst->row[d] + c, dst->n_col - c);
250 for (i = 0; i < s; ++i)
251 isl_int_set(dst->row[d][c + exp[i]], src->row[s][c + i]);
254 /* Compare (known) divs.
255 * Return non-zero if at least one of the two divs is unknown.
257 static int cmp_row(__isl_keep isl_mat *div, int i, int j)
261 if (isl_int_is_zero(div->row[j][0]))
263 if (isl_int_is_zero(div->row[i][0]))
266 li = isl_seq_last_non_zero(div->row[i], div->n_col);
267 lj = isl_seq_last_non_zero(div->row[j], div->n_col);
272 return isl_seq_cmp(div->row[i], div->row[j], div->n_col);
275 /* Combine the two lists of divs into a single list.
276 * For each row i in div1, exp1[i] is set to the position of the corresponding
277 * row in the result. Similarly for div2 and exp2.
278 * This function guarantees
280 * exp1[i+1] > exp1[i]
281 * For optimal merging, the two input list should have been sorted.
283 __isl_give isl_mat *isl_merge_divs(__isl_keep isl_mat *div1,
284 __isl_keep isl_mat *div2, int *exp1, int *exp2)
288 unsigned d = div1->n_col - div1->n_row;
290 div = isl_mat_alloc(div1->ctx, 1 + div1->n_row + div2->n_row,
291 d + div1->n_row + div2->n_row);
295 for (i = 0, j = 0, k = 0; i < div1->n_row && j < div2->n_row; ++k) {
298 expand_row(div, k, div1, i, exp1);
299 expand_row(div, k + 1, div2, j, exp2);
301 cmp = cmp_row(div, k, k + 1);
305 } else if (cmp < 0) {
309 isl_seq_cpy(div->row[k], div->row[k + 1], div->n_col);
312 for (; i < div1->n_row; ++i, ++k) {
313 expand_row(div, k, div1, i, exp1);
316 for (; j < div2->n_row; ++j, ++k) {
317 expand_row(div, k, div2, j, exp2);
327 int isl_local_space_divs_known(__isl_keep isl_local_space *ls)
334 for (i = 0; i < ls->div->n_row; ++i)
335 if (isl_int_is_zero(ls->div->row[i][0]))
341 /* Construct a local space for a map that has the given local
342 * space as domain and that has a zero-dimensional range.
344 __isl_give isl_local_space *isl_local_space_from_domain(
345 __isl_take isl_local_space *ls)
347 ls = isl_local_space_cow(ls);
350 ls->dim = isl_dim_from_domain(ls->dim);
352 return isl_local_space_free(ls);
356 __isl_give isl_local_space *isl_local_space_add_dim(
357 __isl_take isl_local_space *ls, enum isl_dim_type type, unsigned n)
364 ls = isl_local_space_cow(ls);
368 pos = isl_local_space_offset(ls, type);
369 pos += isl_local_space_dim(ls, type);
371 ls->div = isl_mat_insert_zero_cols(ls->div, 1 + pos, n);
373 if (type == isl_dim_div) {
374 ls->div = isl_mat_add_zero_rows(ls->div, n);
376 ls->dim = isl_dim_add(ls->dim, type, n);
378 return isl_local_space_free(ls);
382 return isl_local_space_free(ls);