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 int isl_local_space_dim(__isl_keep isl_local_space *ls,
116 enum isl_dim_type type)
120 if (type == isl_dim_div)
121 return ls->div->n_row;
122 if (type == isl_dim_all)
123 return isl_dim_size(ls->dim, isl_dim_all) + ls->div->n_row;
124 return isl_dim_size(ls->dim, type);
127 unsigned isl_local_space_offset(__isl_keep isl_local_space *ls,
128 enum isl_dim_type type)
137 case isl_dim_cst: return 0;
138 case isl_dim_param: return 1;
139 case isl_dim_in: return 1 + dim->nparam;
140 case isl_dim_out: return 1 + dim->nparam + dim->n_in;
141 case isl_dim_div: return 1 + dim->nparam + dim->n_in + dim->n_out;
146 const char *isl_local_space_get_dim_name(__isl_keep isl_local_space *ls,
147 enum isl_dim_type type, unsigned pos)
149 return ls ? isl_dim_get_name(ls->dim, type, pos) : NULL;
152 __isl_give isl_div *isl_local_space_get_div(__isl_keep isl_local_space *ls,
160 if (pos < 0 || pos >= ls->div->n_row)
161 isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
162 "index out of bounds", return NULL);
164 bmap = isl_basic_map_from_local_space(isl_local_space_copy(ls));
165 return isl_basic_map_div(bmap, pos);
168 __isl_give isl_dim *isl_local_space_get_dim(__isl_keep isl_local_space *ls)
173 return isl_dim_copy(ls->dim);
176 __isl_give isl_local_space *isl_local_space_add_div(
177 __isl_take isl_local_space *ls, __isl_take isl_vec *div)
179 ls = isl_local_space_cow(ls);
183 if (ls->div->n_col != div->size)
184 isl_die(isl_local_space_get_ctx(ls), isl_error_invalid,
185 "incompatible dimensions", goto error);
187 ls->div = isl_mat_add_zero_cols(ls->div, 1);
188 ls->div = isl_mat_add_rows(ls->div, 1);
192 isl_seq_cpy(ls->div->row[ls->div->n_row - 1], div->el, div->size);
193 isl_int_set_si(ls->div->row[ls->div->n_row - 1][div->size], 0);
198 isl_local_space_free(ls);
203 __isl_give isl_local_space *isl_local_space_replace_divs(
204 __isl_take isl_local_space *ls, __isl_take isl_mat *div)
206 ls = isl_local_space_cow(ls);
211 isl_mat_free(ls->div);
216 isl_local_space_free(ls);
220 /* Copy row "s" of "src" to row "d" of "dst", applying the expansion
223 static void expand_row(__isl_keep isl_mat *dst, int d,
224 __isl_keep isl_mat *src, int s, int *exp)
227 unsigned c = src->n_col - src->n_row;
229 isl_seq_cpy(dst->row[d], src->row[s], c);
230 isl_seq_clr(dst->row[d] + c, dst->n_col - c);
232 for (i = 0; i < s; ++i)
233 isl_int_set(dst->row[d][c + exp[i]], src->row[s][c + i]);
236 /* Compare (known) divs.
237 * Return non-zero if at least one of the two divs is unknown.
239 static int cmp_row(__isl_keep isl_mat *div, int i, int j)
243 if (isl_int_is_zero(div->row[j][0]))
245 if (isl_int_is_zero(div->row[i][0]))
248 li = isl_seq_last_non_zero(div->row[i], div->n_col);
249 lj = isl_seq_last_non_zero(div->row[j], div->n_col);
254 return isl_seq_cmp(div->row[i], div->row[j], div->n_col);
257 /* Combine the two lists of divs into a single list.
258 * For each row i in div1, exp1[i] is set to the position of the corresponding
259 * row in the result. Similarly for div2 and exp2.
260 * This function guarantees
262 * exp1[i+1] > exp1[i]
263 * For optimal merging, the two input list should have been sorted.
265 __isl_give isl_mat *isl_merge_divs(__isl_keep isl_mat *div1,
266 __isl_keep isl_mat *div2, int *exp1, int *exp2)
270 unsigned d = div1->n_col - div1->n_row;
272 div = isl_mat_alloc(div1->ctx, 1 + div1->n_row + div2->n_row,
273 d + div1->n_row + div2->n_row);
277 for (i = 0, j = 0, k = 0; i < div1->n_row && j < div2->n_row; ++k) {
280 expand_row(div, k, div1, i, exp1);
281 expand_row(div, k + 1, div2, j, exp2);
283 cmp = cmp_row(div, k, k + 1);
287 } else if (cmp < 0) {
291 isl_seq_cpy(div->row[k], div->row[k + 1], div->n_col);
294 for (; i < div1->n_row; ++i, ++k) {
295 expand_row(div, k, div1, i, exp1);
298 for (; j < div2->n_row; ++j, ++k) {
299 expand_row(div, k, div2, j, exp2);
309 int isl_local_space_divs_known(__isl_keep isl_local_space *ls)
316 for (i = 0; i < ls->div->n_row; ++i)
317 if (isl_int_is_zero(ls->div->row[i][0]))
323 /* Construct a local space for a map that has the given local
324 * space as domain and that has a zero-dimensional range.
326 __isl_give isl_local_space *isl_local_space_from_domain(
327 __isl_take isl_local_space *ls)
329 ls = isl_local_space_cow(ls);
332 ls->dim = isl_dim_from_domain(ls->dim);
334 return isl_local_space_free(ls);