8 #include "isl_map_private.h"
9 #include "isl_map_piplib.h"
10 #include "isl_sample.h"
13 static struct isl_basic_map *basic_map_init(struct isl_ctx *ctx,
14 struct isl_basic_map *bmap,
15 unsigned nparam, unsigned n_in, unsigned n_out, unsigned extra,
16 unsigned n_eq, unsigned n_ineq)
19 size_t row_size = 1 + nparam + n_in + n_out + extra;
21 bmap->block = isl_blk_alloc(ctx, (n_eq + n_ineq) * row_size);
22 if (isl_blk_is_error(bmap->block)) {
27 bmap->eq = isl_alloc_array(ctx, isl_int *, n_eq + n_ineq);
29 isl_blk_free(ctx, bmap->block);
35 bmap->block2 = isl_blk_empty();
38 bmap->block2 = isl_blk_alloc(ctx, extra * (1 + row_size));
39 if (isl_blk_is_error(bmap->block2)) {
41 isl_blk_free(ctx, bmap->block);
46 bmap->div = isl_alloc_array(ctx, isl_int *, extra);
48 isl_blk_free(ctx, bmap->block2);
50 isl_blk_free(ctx, bmap->block);
56 for (i = 0; i < n_eq + n_ineq; ++i)
57 bmap->eq[i] = bmap->block.data + i * row_size;
59 for (i = 0; i < extra; ++i)
60 bmap->div[i] = bmap->block2.data + i * (1 + row_size);
66 bmap->c_size = n_eq + n_ineq;
67 bmap->ineq = bmap->eq + n_eq;
68 bmap->nparam = nparam;
80 struct isl_basic_set *isl_basic_set_alloc(struct isl_ctx *ctx,
81 unsigned nparam, unsigned dim, unsigned extra,
82 unsigned n_eq, unsigned n_ineq)
84 struct isl_basic_map *bmap;
85 bmap = isl_basic_map_alloc(ctx, nparam, 0, dim, extra, n_eq, n_ineq);
86 return (struct isl_basic_set *)bmap;
89 struct isl_basic_map *isl_basic_map_alloc(struct isl_ctx *ctx,
90 unsigned nparam, unsigned in, unsigned out, unsigned extra,
91 unsigned n_eq, unsigned n_ineq)
93 struct isl_basic_map *bmap;
95 bmap = isl_alloc_type(ctx, struct isl_basic_map);
99 return basic_map_init(ctx, bmap,
100 nparam, in, out, extra, n_eq, n_ineq);
103 static void dup_constraints(
104 struct isl_basic_map *dst, struct isl_basic_map *src)
107 unsigned total = src->nparam + src->n_in + src->n_out + src->n_div;
109 for (i = 0; i < src->n_eq; ++i) {
110 int j = isl_basic_map_alloc_equality(dst);
111 isl_seq_cpy(dst->eq[j], src->eq[i], 1+total);
114 for (i = 0; i < src->n_ineq; ++i) {
115 int j = isl_basic_map_alloc_inequality(dst);
116 isl_seq_cpy(dst->ineq[j], src->ineq[i], 1+total);
119 for (i = 0; i < src->n_div; ++i) {
120 int j = isl_basic_map_alloc_div(dst);
121 isl_seq_cpy(dst->div[j], src->div[i], 1+1+total);
123 F_SET(dst, ISL_BASIC_SET_FINAL);
126 struct isl_basic_map *isl_basic_map_dup(struct isl_basic_map *bmap)
128 struct isl_basic_map *dup;
132 dup = isl_basic_map_alloc(bmap->ctx, bmap->nparam,
133 bmap->n_in, bmap->n_out,
134 bmap->n_div, bmap->n_eq, bmap->n_ineq);
137 dup->flags = bmap->flags;
138 dup_constraints(dup, bmap);
139 dup->sample = isl_vec_copy(bmap->ctx, bmap->sample);
143 struct isl_basic_set *isl_basic_set_dup(struct isl_basic_set *bset)
145 struct isl_basic_map *dup;
147 dup = isl_basic_map_dup((struct isl_basic_map *)bset);
148 return (struct isl_basic_set *)dup;
151 struct isl_basic_set *isl_basic_set_copy(struct isl_basic_set *bset)
156 if (F_ISSET(bset, ISL_BASIC_SET_FINAL)) {
160 return isl_basic_set_dup(bset);
163 struct isl_set *isl_set_copy(struct isl_set *set)
172 struct isl_basic_map *isl_basic_map_copy(struct isl_basic_map *bmap)
177 if (F_ISSET(bmap, ISL_BASIC_SET_FINAL)) {
181 return isl_basic_map_dup(bmap);
184 struct isl_map *isl_map_copy(struct isl_map *map)
193 void isl_basic_map_free(struct isl_basic_map *bmap)
201 isl_ctx_deref(bmap->ctx);
203 isl_blk_free(bmap->ctx, bmap->block2);
205 isl_blk_free(bmap->ctx, bmap->block);
206 isl_vec_free(bmap->ctx, bmap->sample);
210 void isl_basic_set_free(struct isl_basic_set *bset)
212 isl_basic_map_free((struct isl_basic_map *)bset);
215 int isl_basic_map_alloc_equality(struct isl_basic_map *bmap)
221 isl_assert(ctx, bmap->n_eq + bmap->n_ineq < bmap->c_size, return -1);
222 isl_assert(ctx, bmap->eq + bmap->n_eq <= bmap->ineq, return -1);
223 if (bmap->eq + bmap->n_eq == bmap->ineq) {
225 int j = isl_basic_map_alloc_inequality(bmap);
229 bmap->ineq[0] = bmap->ineq[j];
237 int isl_basic_set_alloc_equality(struct isl_basic_set *bset)
239 return isl_basic_map_alloc_equality((struct isl_basic_map *)bset);
242 int isl_basic_map_free_equality(struct isl_basic_map *bmap, unsigned n)
246 isl_assert(bmap->ctx, n <= bmap->n_eq, return -1);
251 int isl_basic_map_drop_equality(struct isl_basic_map *bmap, unsigned pos)
256 isl_assert(bmap->ctx, pos < bmap->n_eq, return -1);
258 if (pos != bmap->n_eq - 1) {
260 bmap->eq[pos] = bmap->eq[bmap->n_eq - 1];
261 bmap->eq[bmap->n_eq - 1] = t;
267 int isl_basic_set_drop_equality(struct isl_basic_set *bset, unsigned pos)
269 return isl_basic_map_drop_equality((struct isl_basic_map *)bset, pos);
272 void isl_basic_map_inequality_to_equality(
273 struct isl_basic_map *bmap, unsigned pos)
278 bmap->ineq[pos] = bmap->ineq[0];
279 bmap->ineq[0] = bmap->eq[bmap->n_eq];
280 bmap->eq[bmap->n_eq] = t;
286 int isl_basic_map_alloc_inequality(struct isl_basic_map *bmap)
292 isl_assert(ctx, (bmap->ineq - bmap->eq) + bmap->n_ineq < bmap->c_size,
294 F_CLR(bmap, ISL_BASIC_MAP_NO_IMPLICIT);
295 F_CLR(bmap, ISL_BASIC_MAP_NO_REDUNDANT);
296 return bmap->n_ineq++;
299 int isl_basic_set_alloc_inequality(struct isl_basic_set *bset)
301 return isl_basic_map_alloc_inequality((struct isl_basic_map *)bset);
304 int isl_basic_map_free_inequality(struct isl_basic_map *bmap, unsigned n)
308 isl_assert(bmap->ctx, n <= bmap->n_ineq, return -1);
313 int isl_basic_set_free_inequality(struct isl_basic_set *bset, unsigned n)
315 return isl_basic_map_free_inequality((struct isl_basic_map *)bset, n);
318 int isl_basic_map_drop_inequality(struct isl_basic_map *bmap, unsigned pos)
323 isl_assert(bmap->ctx, pos < bmap->n_ineq, return -1);
325 if (pos != bmap->n_ineq - 1) {
327 bmap->ineq[pos] = bmap->ineq[bmap->n_ineq - 1];
328 bmap->ineq[bmap->n_ineq - 1] = t;
334 int isl_basic_set_drop_inequality(struct isl_basic_set *bset, unsigned pos)
336 return isl_basic_map_drop_inequality((struct isl_basic_map *)bset, pos);
339 int isl_basic_map_alloc_div(struct isl_basic_map *bmap)
343 isl_assert(bmap->ctx, bmap->n_div < bmap->extra, return -1);
344 return bmap->n_div++;
347 int isl_basic_map_free_div(struct isl_basic_map *bmap, unsigned n)
351 isl_assert(bmap->ctx, n <= bmap->n_div, return -1);
356 /* Copy constraint from src to dst, putting the vars of src at offset
357 * dim_off in dst and the divs of src at offset div_off in dst.
358 * If both sets are actually map, then dim_off applies to the input
361 static void copy_constraint(struct isl_basic_map *dst_map, isl_int *dst,
362 struct isl_basic_map *src_map, isl_int *src,
363 unsigned in_off, unsigned out_off, unsigned div_off)
365 isl_int_set(dst[0], src[0]);
366 isl_seq_cpy(dst+1, src+1, isl_min(dst_map->nparam, src_map->nparam));
367 if (dst_map->nparam > src_map->nparam)
368 isl_seq_clr(dst+1+src_map->nparam,
369 dst_map->nparam - src_map->nparam);
370 isl_seq_clr(dst+1+dst_map->nparam, in_off);
371 isl_seq_cpy(dst+1+dst_map->nparam+in_off,
372 src+1+src_map->nparam,
373 isl_min(dst_map->n_in-in_off, src_map->n_in));
374 if (dst_map->n_in-in_off > src_map->n_in)
375 isl_seq_clr(dst+1+dst_map->nparam+in_off+src_map->n_in,
376 dst_map->n_in - in_off - src_map->n_in);
377 isl_seq_clr(dst+1+dst_map->nparam+dst_map->n_in, out_off);
378 isl_seq_cpy(dst+1+dst_map->nparam+dst_map->n_in+out_off,
379 src+1+src_map->nparam+src_map->n_in,
380 isl_min(dst_map->n_out-out_off, src_map->n_out));
381 if (dst_map->n_out-out_off > src_map->n_out)
382 isl_seq_clr(dst+1+dst_map->nparam+dst_map->n_in+out_off+src_map->n_out,
383 dst_map->n_out - out_off - src_map->n_out);
384 isl_seq_clr(dst+1+dst_map->nparam+dst_map->n_in+dst_map->n_out, div_off);
385 isl_seq_cpy(dst+1+dst_map->nparam+dst_map->n_in+dst_map->n_out+div_off,
386 src+1+src_map->nparam+src_map->n_in+src_map->n_out,
387 isl_min(dst_map->extra-div_off, src_map->extra));
388 if (dst_map->extra-div_off > src_map->extra)
389 isl_seq_clr(dst+1+dst_map->nparam+dst_map->n_in+dst_map->n_out+
390 div_off+src_map->extra,
391 dst_map->extra - div_off - src_map->extra);
394 static void copy_div(struct isl_basic_map *dst_map, isl_int *dst,
395 struct isl_basic_map *src_map, isl_int *src,
396 unsigned in_off, unsigned out_off, unsigned div_off)
398 isl_int_set(dst[0], src[0]);
399 copy_constraint(dst_map, dst+1, src_map, src+1, in_off, out_off, div_off);
402 static struct isl_basic_map *add_constraints(struct isl_basic_map *bmap1,
403 struct isl_basic_map *bmap2, unsigned i_pos, unsigned o_pos)
406 unsigned div_off = bmap1->n_div;
408 for (i = 0; i < bmap2->n_eq; ++i) {
409 int i1 = isl_basic_map_alloc_equality(bmap1);
412 copy_constraint(bmap1, bmap1->eq[i1], bmap2, bmap2->eq[i],
413 i_pos, o_pos, div_off);
416 for (i = 0; i < bmap2->n_ineq; ++i) {
417 int i1 = isl_basic_map_alloc_inequality(bmap1);
420 copy_constraint(bmap1, bmap1->ineq[i1], bmap2, bmap2->ineq[i],
421 i_pos, o_pos, div_off);
424 for (i = 0; i < bmap2->n_div; ++i) {
425 int i1 = isl_basic_map_alloc_div(bmap1);
428 copy_div(bmap1, bmap1->div[i1], bmap2, bmap2->div[i],
429 i_pos, o_pos, div_off);
432 isl_basic_map_free(bmap2);
437 isl_basic_map_free(bmap1);
438 isl_basic_map_free(bmap2);
442 struct isl_basic_map *isl_basic_map_extend(struct isl_basic_map *base,
443 unsigned nparam, unsigned n_in, unsigned n_out, unsigned extra,
444 unsigned n_eq, unsigned n_ineq)
446 struct isl_basic_map *ext;
450 base = isl_basic_map_cow(base);
454 dims_ok = base && base->nparam == nparam &&
455 base->n_in == n_in && base->n_out == n_out &&
456 base->extra >= base->n_div + extra;
458 if (dims_ok && n_eq == 0 && n_ineq == 0)
461 isl_assert(base->ctx, base->nparam <= nparam, goto error);
462 isl_assert(base->ctx, base->n_in <= n_in, goto error);
463 isl_assert(base->ctx, base->n_out <= n_out, goto error);
464 extra += base->extra;
466 n_ineq += base->n_ineq;
468 ext = isl_basic_map_alloc(base->ctx, nparam, n_in, n_out,
469 extra, n_eq, n_ineq);
476 ext = add_constraints(ext, base, 0, 0);
479 F_CLR(ext, ISL_BASIC_SET_FINAL);
485 isl_basic_map_free(base);
489 struct isl_basic_set *isl_basic_set_extend(struct isl_basic_set *base,
490 unsigned nparam, unsigned dim, unsigned extra,
491 unsigned n_eq, unsigned n_ineq)
493 return (struct isl_basic_set *)
494 isl_basic_map_extend((struct isl_basic_map *)base,
495 nparam, 0, dim, extra, n_eq, n_ineq);
498 struct isl_basic_set *isl_basic_set_cow(struct isl_basic_set *bset)
500 return (struct isl_basic_set *)
501 isl_basic_map_cow((struct isl_basic_map *)bset);
504 struct isl_basic_map *isl_basic_map_cow(struct isl_basic_map *bmap)
511 bmap = isl_basic_map_dup(bmap);
513 F_CLR(bmap, ISL_BASIC_SET_FINAL);
517 struct isl_set *isl_set_cow(struct isl_set *set)
525 return isl_set_dup(set);
528 struct isl_map *isl_map_cow(struct isl_map *map)
536 return isl_map_dup(map);
539 static void swap_vars(struct isl_blk blk, isl_int *a,
540 unsigned a_len, unsigned b_len)
542 isl_seq_cpy(blk.data, a+a_len, b_len);
543 isl_seq_cpy(blk.data+b_len, a, a_len);
544 isl_seq_cpy(a, blk.data, b_len+a_len);
547 struct isl_basic_set *isl_basic_set_swap_vars(
548 struct isl_basic_set *bset, unsigned n)
556 isl_assert(bset->ctx, n <= bset->dim, goto error);
561 bset = isl_basic_set_cow(bset);
565 blk = isl_blk_alloc(bset->ctx, bset->dim);
566 if (isl_blk_is_error(blk))
569 for (i = 0; i < bset->n_eq; ++i)
571 bset->eq[i]+1+bset->nparam, n, bset->dim - n);
573 for (i = 0; i < bset->n_ineq; ++i)
575 bset->ineq[i]+1+bset->nparam, n, bset->dim - n);
577 for (i = 0; i < bset->n_div; ++i)
579 bset->div[i]+1+1+bset->nparam, n, bset->dim - n);
581 isl_blk_free(bset->ctx, blk);
586 isl_basic_set_free(bset);
590 struct isl_set *isl_set_swap_vars(struct isl_set *set, unsigned n)
593 set = isl_set_cow(set);
597 for (i = 0; i < set->n; ++i) {
598 set->p[i] = isl_basic_set_swap_vars(set->p[i], n);
607 static void constraint_drop_vars(isl_int *c, unsigned n, unsigned rem)
609 isl_seq_cpy(c, c + n, rem);
610 isl_seq_clr(c + rem, n);
613 struct isl_basic_set *isl_basic_set_drop_vars(
614 struct isl_basic_set *bset, unsigned first, unsigned n)
621 isl_assert(bset->ctx, first + n <= bset->dim, goto error);
626 bset = isl_basic_set_cow(bset);
630 for (i = 0; i < bset->n_eq; ++i)
631 constraint_drop_vars(bset->eq[i]+1+bset->nparam+first, n,
632 (bset->dim-first-n)+bset->extra);
634 for (i = 0; i < bset->n_ineq; ++i)
635 constraint_drop_vars(bset->ineq[i]+1+bset->nparam+first, n,
636 (bset->dim-first-n)+bset->extra);
638 for (i = 0; i < bset->n_div; ++i)
639 constraint_drop_vars(bset->div[i]+1+1+bset->nparam+first, n,
640 (bset->dim-first-n)+bset->extra);
645 return isl_basic_set_finalize(bset);
647 isl_basic_set_free(bset);
651 struct isl_set *isl_set_drop_vars(
652 struct isl_set *set, unsigned first, unsigned n)
659 isl_assert(set->ctx, first + n <= set->dim, goto error);
663 set = isl_set_cow(set);
667 for (i = 0; i < set->n; ++i) {
668 set->p[i] = isl_basic_set_drop_vars(set->p[i], first, n);
681 * We don't cow, as the div is assumed to be redundant.
683 static struct isl_basic_map *isl_basic_map_drop_div(
684 struct isl_basic_map *bmap, unsigned div)
692 pos = 1 + bmap->nparam + bmap->n_in + bmap->n_out + div;
694 isl_assert(bmap->ctx, div < bmap->n_div, goto error);
696 for (i = 0; i < bmap->n_eq; ++i)
697 constraint_drop_vars(bmap->eq[i]+pos, 1, bmap->extra-div-1);
699 for (i = 0; i < bmap->n_ineq; ++i) {
700 if (!isl_int_is_zero(bmap->ineq[i][pos])) {
701 isl_basic_map_drop_inequality(bmap, i);
705 constraint_drop_vars(bmap->ineq[i]+pos, 1, bmap->extra-div-1);
708 for (i = 0; i < bmap->n_div; ++i)
709 constraint_drop_vars(bmap->div[i]+1+pos, 1, bmap->extra-div-1);
711 if (div != bmap->n_div - 1) {
713 isl_int *t = bmap->div[div];
715 for (j = div; j < bmap->n_div - 1; ++j)
716 bmap->div[j] = bmap->div[j+1];
718 bmap->div[bmap->n_div - 1] = t;
720 isl_basic_map_free_div(bmap, 1);
724 isl_basic_map_free(bmap);
728 static void eliminate_div(struct isl_basic_map *bmap, isl_int *eq, unsigned div)
731 unsigned pos = 1 + bmap->nparam + bmap->n_in + bmap->n_out + div;
733 len = 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
735 for (i = 0; i < bmap->n_eq; ++i)
736 if (bmap->eq[i] != eq)
737 isl_seq_elim(bmap->eq[i], eq, pos, len, NULL);
739 for (i = 0; i < bmap->n_ineq; ++i)
740 isl_seq_elim(bmap->ineq[i], eq, pos, len, NULL);
742 /* We need to be careful about circular definitions,
743 * so for now we just remove the definitions of other divs that
744 * depend on this div and (possibly) recompute them later.
746 for (i = 0; i < bmap->n_div; ++i)
747 if (!isl_int_is_zero(bmap->div[i][0]) &&
748 !isl_int_is_zero(bmap->div[i][1 + pos]))
749 isl_seq_clr(bmap->div[i], 1 + len);
751 isl_basic_map_drop_div(bmap, div);
754 struct isl_basic_map *isl_basic_map_set_to_empty(struct isl_basic_map *bmap)
760 total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra;
761 isl_basic_map_free_div(bmap, bmap->n_div);
762 isl_basic_map_free_inequality(bmap, bmap->n_ineq);
764 isl_basic_map_free_equality(bmap, bmap->n_eq-1);
766 isl_basic_map_alloc_equality(bmap);
770 isl_int_set_si(bmap->eq[i][0], 1);
771 isl_seq_clr(bmap->eq[i]+1, total);
772 F_SET(bmap, ISL_BASIC_MAP_EMPTY);
773 return isl_basic_map_finalize(bmap);
775 isl_basic_map_free(bmap);
779 struct isl_basic_set *isl_basic_set_set_to_empty(struct isl_basic_set *bset)
781 return (struct isl_basic_set *)
782 isl_basic_map_set_to_empty((struct isl_basic_map *)bset);
785 static void swap_equality(struct isl_basic_map *bmap, int a, int b)
787 isl_int *t = bmap->eq[a];
788 bmap->eq[a] = bmap->eq[b];
792 static void swap_inequality(struct isl_basic_map *bmap, int a, int b)
794 isl_int *t = bmap->ineq[a];
795 bmap->ineq[a] = bmap->ineq[b];
799 static void swap_div(struct isl_basic_map *bmap, int a, int b)
802 unsigned off = bmap->nparam + bmap->n_in + bmap->n_out;
803 isl_int *t = bmap->div[a];
804 bmap->div[a] = bmap->div[b];
807 for (i = 0; i < bmap->n_eq; ++i)
808 isl_int_swap(bmap->eq[i][1+off+a], bmap->eq[i][1+off+b]);
810 for (i = 0; i < bmap->n_ineq; ++i)
811 isl_int_swap(bmap->ineq[i][1+off+a], bmap->ineq[i][1+off+b]);
813 for (i = 0; i < bmap->n_div; ++i)
814 isl_int_swap(bmap->div[i][1+1+off+a], bmap->div[i][1+1+off+b]);
817 struct isl_basic_map *isl_basic_map_gauss(
818 struct isl_basic_map *bmap, int *progress)
829 total_var = bmap->nparam + bmap->n_in + bmap->n_out;
830 total = total_var + bmap->n_div;
832 last_var = total - 1;
833 for (done = 0; done < bmap->n_eq; ++done) {
834 for (; last_var >= 0; --last_var) {
835 for (k = done; k < bmap->n_eq; ++k)
836 if (!isl_int_is_zero(bmap->eq[k][1+last_var]))
844 swap_equality(bmap, k, done);
845 if (isl_int_is_neg(bmap->eq[done][1+last_var]))
846 isl_seq_neg(bmap->eq[done], bmap->eq[done], 1+total);
848 for (k = 0; k < bmap->n_eq; ++k) {
851 if (isl_int_is_zero(bmap->eq[k][1+last_var]))
855 isl_seq_elim(bmap->eq[k], bmap->eq[done],
856 1+last_var, 1+total, NULL);
859 for (k = 0; k < bmap->n_ineq; ++k) {
860 if (isl_int_is_zero(bmap->ineq[k][1+last_var]))
864 isl_seq_elim(bmap->ineq[k], bmap->eq[done],
865 1+last_var, 1+total, NULL);
868 for (k = 0; k < bmap->n_div; ++k) {
869 if (isl_int_is_zero(bmap->div[k][0]))
871 if (isl_int_is_zero(bmap->div[k][1+1+last_var]))
875 isl_seq_elim(bmap->div[k]+1, bmap->eq[done],
876 1+last_var, 1+total, &bmap->div[k][0]);
879 if (last_var >= total_var &&
880 isl_int_is_zero(bmap->div[last_var - total_var][0])) {
881 unsigned div = last_var - total_var;
882 isl_seq_neg(bmap->div[div]+1, bmap->eq[done], 1+total);
883 isl_int_set_si(bmap->div[div][1+1+last_var], 0);
884 isl_int_set(bmap->div[div][0],
885 bmap->eq[done][1+last_var]);
888 if (done == bmap->n_eq)
890 for (k = done; k < bmap->n_eq; ++k) {
891 if (isl_int_is_zero(bmap->eq[k][0]))
893 return isl_basic_map_set_to_empty(bmap);
895 isl_basic_map_free_equality(bmap, bmap->n_eq-done);
899 struct isl_basic_set *isl_basic_set_gauss(
900 struct isl_basic_set *bset, int *progress)
902 return (struct isl_basic_set*)isl_basic_map_gauss(
903 (struct isl_basic_map *)bset, progress);
906 static unsigned int round_up(unsigned int v)
917 static int hash_index(int *index, unsigned int size, int bits,
918 struct isl_basic_map *bmap, int k)
921 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
922 u_int32_t hash = isl_seq_hash(bmap->ineq[k]+1, total, bits);
923 for (h = hash; index[h]; h = (h+1) % size)
924 if (k != index[h]-1 &&
925 isl_seq_eq(bmap->ineq[k]+1,
926 bmap->ineq[index[h]-1]+1, total))
931 static struct isl_basic_map *remove_duplicate_constraints(
932 struct isl_basic_map *bmap, int *progress)
938 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
941 if (bmap->n_ineq <= 1)
944 size = round_up(4 * (bmap->n_ineq+1) / 3 - 1);
945 bits = ffs(size) - 1;
946 index = isl_alloc_array(ctx, int, size);
947 memset(index, 0, size * sizeof(int));
951 index[isl_seq_hash(bmap->ineq[0]+1, total, bits)] = 1;
952 for (k = 1; k < bmap->n_ineq; ++k) {
953 h = hash_index(index, size, bits, bmap, k);
960 if (isl_int_lt(bmap->ineq[k][0], bmap->ineq[l][0]))
961 swap_inequality(bmap, k, l);
962 isl_basic_map_drop_inequality(bmap, k);
966 for (k = 0; k < bmap->n_ineq-1; ++k) {
967 isl_seq_neg(bmap->ineq[k]+1, bmap->ineq[k]+1, total);
968 h = hash_index(index, size, bits, bmap, k);
969 isl_seq_neg(bmap->ineq[k]+1, bmap->ineq[k]+1, total);
973 isl_int_add(sum, bmap->ineq[k][0], bmap->ineq[l][0]);
974 if (isl_int_is_pos(sum))
976 if (isl_int_is_zero(sum)) {
977 /* We need to break out of the loop after these
978 * changes since the contents of the hash
979 * will no longer be valid.
980 * Plus, we probably we want to regauss first.
982 isl_basic_map_drop_inequality(bmap, l);
983 isl_basic_map_inequality_to_equality(bmap, k);
985 bmap = isl_basic_map_set_to_empty(bmap);
994 static struct isl_basic_map *remove_duplicate_divs(
995 struct isl_basic_map *bmap, int *progress)
1002 unsigned total_var = bmap->nparam + bmap->n_in + bmap->n_out;
1003 unsigned total = total_var + bmap->n_div;
1004 struct isl_ctx *ctx;
1006 if (bmap->n_div <= 1)
1010 for (k = bmap->n_div - 1; k >= 0; --k)
1011 if (!isl_int_is_zero(bmap->div[k][0]))
1016 size = round_up(4 * bmap->n_div / 3 - 1);
1017 bits = ffs(size) - 1;
1018 index = isl_alloc_array(ctx, int, size);
1019 memset(index, 0, size * sizeof(int));
1022 eq = isl_blk_alloc(ctx, 1+total);
1023 if (isl_blk_is_error(eq))
1026 isl_seq_clr(eq.data, 1+total);
1027 index[isl_seq_hash(bmap->div[k], 2+total, bits)] = k + 1;
1028 for (--k; k >= 0; --k) {
1031 if (isl_int_is_zero(bmap->div[k][0]))
1034 hash = isl_seq_hash(bmap->div[k], 2+total, bits);
1035 for (h = hash; index[h]; h = (h+1) % size)
1036 if (isl_seq_eq(bmap->div[k],
1037 bmap->div[index[h]-1], 2+total))
1042 isl_int_set_si(eq.data[1+total_var+k], -1);
1043 isl_int_set_si(eq.data[1+total_var+l], 1);
1044 eliminate_div(bmap, eq.data, l);
1045 isl_int_set_si(eq.data[1+total_var+k], 0);
1046 isl_int_set_si(eq.data[1+total_var+l], 0);
1051 isl_blk_free(ctx, eq);
1057 /* Elimininate divs based on equalities
1059 static struct isl_basic_map *eliminate_divs_eq(
1060 struct isl_basic_map *bmap, int *progress)
1070 off = 1 + bmap->nparam + bmap->n_in + bmap->n_out;
1072 for (d = bmap->n_div - 1; d >= 0 ; --d) {
1073 for (i = 0; i < bmap->n_eq; ++i) {
1074 if (!isl_int_is_one(bmap->eq[i][off + d]) &&
1075 !isl_int_is_negone(bmap->eq[i][off + d]))
1079 eliminate_div(bmap, bmap->eq[i], d);
1080 isl_basic_map_drop_equality(bmap, i);
1085 return eliminate_divs_eq(bmap, progress);
1089 static struct isl_basic_map *normalize_constraints(struct isl_basic_map *bmap)
1093 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
1096 for (i = bmap->n_eq - 1; i >= 0; --i) {
1097 isl_seq_gcd(bmap->eq[i]+1, total, &gcd);
1098 if (isl_int_is_zero(gcd)) {
1099 if (!isl_int_is_zero(bmap->eq[i][0])) {
1100 bmap = isl_basic_map_set_to_empty(bmap);
1103 isl_basic_map_drop_equality(bmap, i);
1106 if (F_ISSET(bmap, ISL_BASIC_MAP_RATIONAL))
1107 isl_int_gcd(gcd, gcd, bmap->eq[i][0]);
1108 if (isl_int_is_one(gcd))
1110 if (!isl_int_is_divisible_by(bmap->eq[i][0], gcd)) {
1111 bmap = isl_basic_map_set_to_empty(bmap);
1114 isl_seq_scale_down(bmap->eq[i], bmap->eq[i], gcd, 1+total);
1117 for (i = bmap->n_ineq - 1; i >= 0; --i) {
1118 isl_seq_gcd(bmap->ineq[i]+1, total, &gcd);
1119 if (isl_int_is_zero(gcd)) {
1120 if (isl_int_is_neg(bmap->ineq[i][0])) {
1121 bmap = isl_basic_map_set_to_empty(bmap);
1124 isl_basic_map_drop_inequality(bmap, i);
1127 if (F_ISSET(bmap, ISL_BASIC_MAP_RATIONAL))
1128 isl_int_gcd(gcd, gcd, bmap->ineq[i][0]);
1129 if (isl_int_is_one(gcd))
1131 isl_int_fdiv_q(bmap->ineq[i][0], bmap->ineq[i][0], gcd);
1132 isl_seq_scale_down(bmap->ineq[i]+1, bmap->ineq[i]+1, gcd, total);
1140 /* Eliminate the specified variables from the constraints using
1141 * Fourier-Motzkin. The variables themselves are not removed.
1143 struct isl_basic_map *isl_basic_map_eliminate_vars(
1144 struct isl_basic_map *bmap, int pos, unsigned n)
1153 total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
1154 extra = bmap->extra - bmap->n_div;
1156 bmap = isl_basic_map_cow(bmap);
1157 bmap = isl_basic_map_gauss(bmap, NULL);
1158 for (d = pos + n - 1; d >= pos; --d) {
1159 int n_lower, n_upper;
1162 for (i = 0; i < bmap->n_eq; ++i) {
1163 if (isl_int_is_zero(bmap->eq[i][1+d]))
1165 isl_basic_map_drop_equality(bmap, i);
1172 for (i = 0; i < bmap->n_ineq; ++i) {
1173 if (isl_int_is_pos(bmap->ineq[i][1+d]))
1175 else if (isl_int_is_neg(bmap->ineq[i][1+d]))
1178 bmap = isl_basic_map_extend(bmap,
1179 bmap->nparam, bmap->n_in, bmap->n_out, 0,
1180 0, n_lower * n_upper);
1181 for (i = bmap->n_ineq - 1; i >= 0; --i) {
1183 if (isl_int_is_zero(bmap->ineq[i][1+d]))
1186 for (j = 0; j < i; ++j) {
1187 if (isl_int_is_zero(bmap->ineq[j][1+d]))
1190 if (isl_int_sgn(bmap->ineq[i][1+d]) ==
1191 isl_int_sgn(bmap->ineq[j][1+d]))
1193 k = isl_basic_map_alloc_inequality(bmap);
1196 isl_seq_cpy(bmap->ineq[k], bmap->ineq[i],
1198 isl_seq_clr(bmap->ineq[k]+1+total, extra);
1199 isl_seq_elim(bmap->ineq[k], bmap->ineq[j],
1200 1+d, 1+total, NULL);
1202 isl_basic_map_drop_inequality(bmap, i);
1205 if (n_lower > 0 && n_upper > 0) {
1206 bmap = normalize_constraints(bmap);
1207 bmap = isl_basic_map_gauss(bmap, NULL);
1208 if (F_ISSET(bmap, ISL_BASIC_MAP_EMPTY))
1214 isl_basic_map_free(bmap);
1218 struct isl_basic_set *isl_basic_set_eliminate_vars(
1219 struct isl_basic_set *bset, unsigned pos, unsigned n)
1221 return (struct isl_basic_set *)isl_basic_map_eliminate_vars(
1222 (struct isl_basic_map *)bset, pos, n);
1225 /* Elimininate divs based on inequalities
1227 static struct isl_basic_map *eliminate_divs_ineq(
1228 struct isl_basic_map *bmap, int *progress)
1233 struct isl_ctx *ctx;
1239 off = 1 + bmap->nparam + bmap->n_in + bmap->n_out;
1241 for (d = bmap->n_div - 1; d >= 0 ; --d) {
1242 for (i = 0; i < bmap->n_eq; ++i)
1243 if (!isl_int_is_zero(bmap->eq[i][off + d]))
1247 for (i = 0; i < bmap->n_ineq; ++i)
1248 if (isl_int_abs_gt(bmap->ineq[i][off + d], ctx->one))
1250 if (i < bmap->n_ineq)
1253 bmap = isl_basic_map_eliminate_vars(bmap, (off-1)+d, 1);
1254 if (F_ISSET(bmap, ISL_BASIC_MAP_EMPTY))
1256 bmap = isl_basic_map_drop_div(bmap, d);
1263 struct isl_basic_map *isl_basic_map_simplify(struct isl_basic_map *bmap)
1270 bmap = normalize_constraints(bmap);
1271 bmap = eliminate_divs_eq(bmap, &progress);
1272 bmap = eliminate_divs_ineq(bmap, &progress);
1273 bmap = isl_basic_map_gauss(bmap, &progress);
1274 bmap = remove_duplicate_divs(bmap, &progress);
1275 bmap = remove_duplicate_constraints(bmap, &progress);
1280 struct isl_basic_set *isl_basic_set_simplify(struct isl_basic_set *bset)
1282 return (struct isl_basic_set *)
1283 isl_basic_map_simplify((struct isl_basic_map *)bset);
1286 static void dump_term(struct isl_basic_map *bmap,
1287 isl_int c, int pos, FILE *out)
1289 unsigned in = bmap->n_in;
1290 unsigned dim = bmap->n_in + bmap->n_out;
1292 isl_int_print(out, c);
1294 if (!isl_int_is_one(c))
1295 isl_int_print(out, c);
1296 if (pos < 1 + bmap->nparam)
1297 fprintf(out, "p%d", pos - 1);
1298 else if (pos < 1 + bmap->nparam + in)
1299 fprintf(out, "i%d", pos - 1 - bmap->nparam);
1300 else if (pos < 1 + bmap->nparam + dim)
1301 fprintf(out, "o%d", pos - 1 - bmap->nparam - in);
1303 fprintf(out, "e%d", pos - 1 - bmap->nparam - dim);
1307 static void dump_constraint_sign(struct isl_basic_map *bmap, isl_int *c,
1308 int sign, FILE *out)
1312 unsigned len = 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
1316 for (i = 0, first = 1; i < len; ++i) {
1317 if (isl_int_sgn(c[i]) * sign <= 0)
1320 fprintf(out, " + ");
1322 isl_int_abs(v, c[i]);
1323 dump_term(bmap, v, i, out);
1330 static void dump_constraint(struct isl_basic_map *bmap, isl_int *c,
1331 const char *op, FILE *out, int indent)
1335 fprintf(out, "%*s", indent, "");
1337 dump_constraint_sign(bmap, c, 1, out);
1338 fprintf(out, " %s ", op);
1339 dump_constraint_sign(bmap, c, -1, out);
1343 for (i = bmap->n_div; i < bmap->extra; ++i) {
1344 if (isl_int_is_zero(c[1+bmap->nparam+bmap->n_in+bmap->n_out+i]))
1346 fprintf(out, "%*s", indent, "");
1347 fprintf(out, "ERROR: unused div coefficient not zero\n");
1351 static void dump_constraints(struct isl_basic_map *bmap,
1352 isl_int **c, unsigned n,
1353 const char *op, FILE *out, int indent)
1357 for (i = 0; i < n; ++i)
1358 dump_constraint(bmap, c[i], op, out, indent);
1361 static void dump_affine(struct isl_basic_map *bmap, isl_int *exp, FILE *out)
1365 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
1367 for (j = 0; j < 1 + total; ++j) {
1368 if (isl_int_is_zero(exp[j]))
1370 if (!first && isl_int_is_pos(exp[j]))
1372 dump_term(bmap, exp[j], j, out);
1377 static void dump(struct isl_basic_map *bmap, FILE *out, int indent)
1381 dump_constraints(bmap, bmap->eq, bmap->n_eq, "=", out, indent);
1382 dump_constraints(bmap, bmap->ineq, bmap->n_ineq, ">=", out, indent);
1384 for (i = 0; i < bmap->n_div; ++i) {
1385 fprintf(out, "%*s", indent, "");
1386 fprintf(out, "e%d = [(", i);
1387 dump_affine(bmap, bmap->div[i]+1, out);
1389 isl_int_print(out, bmap->div[i][0]);
1390 fprintf(out, "]\n");
1394 void isl_basic_set_dump(struct isl_basic_set *bset, FILE *out, int indent)
1397 fprintf(out, "null basic set\n");
1401 fprintf(out, "%*s", indent, "");
1402 fprintf(out, "nparam: %d, dim: %d, extra: %d\n",
1403 bset->nparam, bset->dim, bset->extra);
1404 dump((struct isl_basic_map *)bset, out, indent);
1407 void isl_basic_map_dump(struct isl_basic_map *bmap, FILE *out, int indent)
1410 fprintf(out, "null basic map\n");
1414 fprintf(out, "%*s", indent, "");
1415 fprintf(out, "ref: %d, nparam: %d, in: %d, out: %d, extra: %d, flags: %x\n",
1417 bmap->nparam, bmap->n_in, bmap->n_out, bmap->extra, bmap->flags);
1418 dump(bmap, out, indent);
1421 int isl_inequality_negate(struct isl_basic_map *bmap, unsigned pos)
1423 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
1426 isl_assert(bmap->ctx, pos < bmap->n_ineq, return -1);
1427 isl_seq_neg(bmap->ineq[pos], bmap->ineq[pos], 1 + total);
1428 isl_int_sub_ui(bmap->ineq[pos][0], bmap->ineq[pos][0], 1);
1432 struct isl_set *isl_set_alloc(struct isl_ctx *ctx,
1433 unsigned nparam, unsigned dim, int n, unsigned flags)
1435 struct isl_set *set;
1437 isl_assert(ctx, n >= 0, return NULL);
1438 set = isl_alloc(ctx, struct isl_set,
1439 sizeof(struct isl_set) +
1440 n * sizeof(struct isl_basic_set *));
1449 set->nparam = nparam;
1456 struct isl_set *isl_set_dup(struct isl_set *set)
1459 struct isl_set *dup;
1464 dup = isl_set_alloc(set->ctx, set->nparam, set->dim, set->n, set->flags);
1467 for (i = 0; i < set->n; ++i)
1468 dup = isl_set_add(dup,
1469 isl_basic_set_dup(set->p[i]));
1473 struct isl_set *isl_set_from_basic_set(struct isl_basic_set *bset)
1475 struct isl_set *set;
1480 set = isl_set_alloc(bset->ctx, bset->nparam, bset->dim, 1, ISL_MAP_DISJOINT);
1482 isl_basic_set_free(bset);
1485 return isl_set_add(set, bset);
1488 struct isl_map *isl_map_from_basic_map(struct isl_basic_map *bmap)
1490 struct isl_map *map;
1495 map = isl_map_alloc(bmap->ctx, bmap->nparam, bmap->n_in, bmap->n_out, 1,
1498 isl_basic_map_free(bmap);
1501 return isl_map_add(map, bmap);
1504 struct isl_set *isl_set_add(struct isl_set *set, struct isl_basic_set *bset)
1508 isl_assert(set->ctx, set->nparam == bset->nparam, goto error);
1509 isl_assert(set->ctx, set->dim == bset->dim, goto error);
1510 isl_assert(set->ctx, set->n < set->size, goto error);
1511 set->p[set->n] = bset;
1518 isl_basic_set_free(bset);
1522 void isl_set_free(struct isl_set *set)
1532 isl_ctx_deref(set->ctx);
1533 for (i = 0; i < set->n; ++i)
1534 isl_basic_set_free(set->p[i]);
1538 void isl_set_dump(struct isl_set *set, FILE *out, int indent)
1543 fprintf(out, "null set\n");
1547 fprintf(out, "%*s", indent, "");
1548 fprintf(out, "ref: %d, n: %d\n", set->ref, set->n);
1549 for (i = 0; i < set->n; ++i) {
1550 fprintf(out, "%*s", indent, "");
1551 fprintf(out, "basic set %d:\n", i);
1552 isl_basic_set_dump(set->p[i], out, indent+4);
1556 void isl_map_dump(struct isl_map *map, FILE *out, int indent)
1561 fprintf(out, "null map\n");
1565 fprintf(out, "%*s", indent, "");
1566 fprintf(out, "ref: %d, n: %d, nparam: %d, in: %d, out: %d, flags: %x\n",
1567 map->ref, map->n, map->nparam, map->n_in, map->n_out,
1569 for (i = 0; i < map->n; ++i) {
1570 fprintf(out, "%*s", indent, "");
1571 fprintf(out, "basic map %d:\n", i);
1572 isl_basic_map_dump(map->p[i], out, indent+4);
1576 struct isl_basic_map *isl_basic_map_intersect_domain(
1577 struct isl_basic_map *bmap, struct isl_basic_set *bset)
1579 struct isl_basic_map *bmap_domain;
1584 isl_assert(bset->ctx, bset->dim == bmap->n_in, goto error);
1585 isl_assert(bset->ctx, bset->nparam == bmap->nparam, goto error);
1587 bmap = isl_basic_map_extend(bmap,
1588 bset->nparam, bmap->n_in, bmap->n_out,
1589 bset->n_div, bset->n_eq, bset->n_ineq);
1592 bmap_domain = isl_basic_map_from_basic_set(bset,
1594 bmap = add_constraints(bmap, bmap_domain, 0, 0);
1596 bmap = isl_basic_map_simplify(bmap);
1597 return isl_basic_map_finalize(bmap);
1599 isl_basic_map_free(bmap);
1600 isl_basic_set_free(bset);
1604 struct isl_basic_map *isl_basic_map_intersect_range(
1605 struct isl_basic_map *bmap, struct isl_basic_set *bset)
1607 struct isl_basic_map *bmap_range;
1612 isl_assert(bset->ctx, bset->dim == bmap->n_out, goto error);
1613 isl_assert(bset->ctx, bset->nparam == bmap->nparam, goto error);
1615 bmap = isl_basic_map_extend(bmap,
1616 bset->nparam, bmap->n_in, bmap->n_out,
1617 bset->n_div, bset->n_eq, bset->n_ineq);
1620 bmap_range = isl_basic_map_from_basic_set(bset,
1622 bmap = add_constraints(bmap, bmap_range, 0, 0);
1624 bmap = isl_basic_map_simplify(bmap);
1625 return isl_basic_map_finalize(bmap);
1627 isl_basic_map_free(bmap);
1628 isl_basic_set_free(bset);
1632 struct isl_basic_map *isl_basic_map_intersect(
1633 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
1635 if (!bmap1 || !bmap2)
1638 isl_assert(bmap1->ctx, bmap1->nparam == bmap2->nparam, goto error);
1639 isl_assert(bmap1->ctx, bmap1->n_in == bmap2->n_in, goto error);
1640 isl_assert(bmap1->ctx, bmap1->n_out == bmap2->n_out, goto error);
1642 bmap1 = isl_basic_map_extend(bmap1,
1643 bmap1->nparam, bmap1->n_in, bmap1->n_out,
1644 bmap2->n_div, bmap2->n_eq, bmap2->n_ineq);
1647 bmap1 = add_constraints(bmap1, bmap2, 0, 0);
1649 bmap1 = isl_basic_map_simplify(bmap1);
1650 return isl_basic_map_finalize(bmap1);
1652 isl_basic_map_free(bmap1);
1653 isl_basic_map_free(bmap2);
1657 struct isl_basic_set *isl_basic_set_intersect(
1658 struct isl_basic_set *bset1, struct isl_basic_set *bset2)
1660 return (struct isl_basic_set *)
1661 isl_basic_map_intersect(
1662 (struct isl_basic_map *)bset1,
1663 (struct isl_basic_map *)bset2);
1666 struct isl_map *isl_map_intersect(struct isl_map *map1, struct isl_map *map2)
1669 struct isl_map *result;
1675 if (F_ISSET(map1, ISL_MAP_DISJOINT) &&
1676 F_ISSET(map2, ISL_MAP_DISJOINT))
1677 FL_SET(flags, ISL_MAP_DISJOINT);
1679 result = isl_map_alloc(map1->ctx, map1->nparam, map1->n_in, map1->n_out,
1680 map1->n * map2->n, flags);
1683 for (i = 0; i < map1->n; ++i)
1684 for (j = 0; j < map2->n; ++j) {
1685 struct isl_basic_map *part;
1686 part = isl_basic_map_intersect(
1687 isl_basic_map_copy(map1->p[i]),
1688 isl_basic_map_copy(map2->p[j]));
1689 if (isl_basic_map_is_empty(part))
1690 isl_basic_map_free(part);
1692 result = isl_map_add(result, part);
1705 struct isl_set *isl_set_intersect(struct isl_set *set1, struct isl_set *set2)
1707 return (struct isl_set *)
1708 isl_map_intersect((struct isl_map *)set1,
1709 (struct isl_map *)set2);
1712 struct isl_basic_map *isl_basic_map_reverse(struct isl_basic_map *bmap)
1714 struct isl_basic_set *bset;
1719 bmap = isl_basic_map_cow(bmap);
1723 bset = isl_basic_set_from_basic_map(bmap);
1724 bset = isl_basic_set_swap_vars(bset, in);
1725 return isl_basic_map_from_basic_set(bset, bset->dim-in, in);
1728 /* Turn final n dimensions into existentially quantified variables.
1730 struct isl_basic_set *isl_basic_set_project_out(
1731 struct isl_basic_set *bset, unsigned n, unsigned flags)
1741 isl_assert(bset->ctx, n <= bset->dim, goto error);
1746 bset = isl_basic_set_cow(bset);
1748 row_size = 1 + bset->nparam + bset->dim + bset->extra;
1749 old = bset->block2.data;
1750 bset->block2 = isl_blk_extend(bset->ctx, bset->block2,
1751 (bset->extra + n) * (1 + row_size));
1752 if (!bset->block2.data)
1754 new_div = isl_alloc_array(ctx, isl_int *, bset->extra + n);
1757 for (i = 0; i < n; ++i) {
1758 new_div[i] = bset->block2.data +
1759 (bset->extra + i) * (1 + row_size);
1760 isl_seq_clr(new_div[i], 1 + row_size);
1762 for (i = 0; i < bset->extra; ++i)
1763 new_div[n + i] = bset->block2.data + (bset->div[i] - old);
1765 bset->div = new_div;
1769 bset = isl_basic_set_simplify(bset);
1770 return isl_basic_set_finalize(bset);
1772 isl_basic_set_free(bset);
1776 struct isl_basic_map *isl_basic_map_apply_range(
1777 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
1779 struct isl_basic_set *bset;
1780 unsigned n_in, n_out;
1782 if (!bmap1 || !bmap2)
1785 isl_assert(bmap->ctx, bmap1->n_out == bmap2->n_in, goto error);
1786 isl_assert(bmap->ctx, bmap1->nparam == bmap2->nparam, goto error);
1789 n_out = bmap2->n_out;
1791 bmap2 = isl_basic_map_reverse(bmap2);
1794 bmap1 = isl_basic_map_extend(bmap1, bmap1->nparam,
1795 bmap1->n_in + bmap2->n_in, bmap1->n_out,
1796 bmap2->extra, bmap2->n_eq, bmap2->n_ineq);
1799 bmap1 = add_constraints(bmap1, bmap2, bmap1->n_in - bmap2->n_in, 0);
1800 bmap1 = isl_basic_map_simplify(bmap1);
1801 bset = isl_basic_set_from_basic_map(bmap1);
1802 bset = isl_basic_set_project_out(bset,
1803 bset->dim - (n_in + n_out), 0);
1804 return isl_basic_map_from_basic_set(bset, n_in, n_out);
1806 isl_basic_map_free(bmap1);
1807 isl_basic_map_free(bmap2);
1811 struct isl_basic_set *isl_basic_set_apply(
1812 struct isl_basic_set *bset, struct isl_basic_map *bmap)
1817 isl_assert(bset->ctx, bset->dim == bmap->n_in, goto error);
1819 return (struct isl_basic_set *)
1820 isl_basic_map_apply_range((struct isl_basic_map *)bset, bmap);
1822 isl_basic_set_free(bset);
1823 isl_basic_map_free(bmap);
1827 struct isl_basic_map *isl_basic_map_apply_domain(
1828 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
1830 if (!bmap1 || !bmap2)
1833 isl_assert(ctx, bmap1->n_in == bmap2->n_in, goto error);
1834 isl_assert(ctx, bmap1->nparam == bmap2->nparam, goto error);
1836 bmap1 = isl_basic_map_reverse(bmap1);
1837 bmap1 = isl_basic_map_apply_range(bmap1, bmap2);
1838 return isl_basic_map_reverse(bmap1);
1840 isl_basic_map_free(bmap1);
1841 isl_basic_map_free(bmap2);
1845 static struct isl_basic_map *var_equal(struct isl_ctx *ctx,
1846 struct isl_basic_map *bmap, unsigned pos)
1849 i = isl_basic_map_alloc_equality(bmap);
1852 isl_seq_clr(bmap->eq[i],
1853 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra);
1854 isl_int_set_si(bmap->eq[i][1+bmap->nparam+pos], -1);
1855 isl_int_set_si(bmap->eq[i][1+bmap->nparam+bmap->n_in+pos], 1);
1856 return isl_basic_map_finalize(bmap);
1858 isl_basic_map_free(bmap);
1862 static struct isl_basic_map *var_more(struct isl_ctx *ctx,
1863 struct isl_basic_map *bmap, unsigned pos)
1866 i = isl_basic_map_alloc_inequality(bmap);
1869 isl_seq_clr(bmap->ineq[i],
1870 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra);
1871 isl_int_set_si(bmap->ineq[i][0], -1);
1872 isl_int_set_si(bmap->ineq[i][1+bmap->nparam+pos], -1);
1873 isl_int_set_si(bmap->ineq[i][1+bmap->nparam+bmap->n_in+pos], 1);
1874 return isl_basic_map_finalize(bmap);
1876 isl_basic_map_free(bmap);
1880 static struct isl_basic_map *var_less(struct isl_ctx *ctx,
1881 struct isl_basic_map *bmap, unsigned pos)
1884 i = isl_basic_map_alloc_inequality(bmap);
1887 isl_seq_clr(bmap->ineq[i],
1888 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra);
1889 isl_int_set_si(bmap->ineq[i][0], -1);
1890 isl_int_set_si(bmap->ineq[i][1+bmap->nparam+pos], 1);
1891 isl_int_set_si(bmap->ineq[i][1+bmap->nparam+bmap->n_in+pos], -1);
1892 return isl_basic_map_finalize(bmap);
1894 isl_basic_map_free(bmap);
1898 struct isl_basic_map *isl_basic_map_equal(struct isl_ctx *ctx,
1899 unsigned nparam, unsigned in, unsigned out, unsigned n_equal)
1902 struct isl_basic_map *bmap;
1903 bmap = isl_basic_map_alloc(ctx, nparam, in, out, 0, n_equal, 0);
1906 for (i = 0; i < n_equal && bmap; ++i)
1907 bmap = var_equal(ctx, bmap, i);
1908 return isl_basic_map_finalize(bmap);
1911 struct isl_basic_map *isl_basic_map_less_at(struct isl_ctx *ctx,
1912 unsigned nparam, unsigned in, unsigned out, unsigned pos)
1915 struct isl_basic_map *bmap;
1916 bmap = isl_basic_map_alloc(ctx, nparam, in, out, 0, pos, 1);
1919 for (i = 0; i < pos && bmap; ++i)
1920 bmap = var_equal(ctx, bmap, i);
1922 bmap = var_less(ctx, bmap, pos);
1923 return isl_basic_map_finalize(bmap);
1926 struct isl_basic_map *isl_basic_map_more_at(struct isl_ctx *ctx,
1927 unsigned nparam, unsigned in, unsigned out, unsigned pos)
1930 struct isl_basic_map *bmap;
1931 bmap = isl_basic_map_alloc(ctx, nparam, in, out, 0, pos, 1);
1934 for (i = 0; i < pos && bmap; ++i)
1935 bmap = var_equal(ctx, bmap, i);
1937 bmap = var_more(ctx, bmap, pos);
1938 return isl_basic_map_finalize(bmap);
1941 struct isl_basic_map *isl_basic_map_from_basic_set(
1942 struct isl_basic_set *bset, unsigned n_in, unsigned n_out)
1944 struct isl_basic_map *bmap;
1946 bset = isl_basic_set_cow(bset);
1950 isl_assert(ctx, bset->dim == n_in + n_out, goto error);
1951 bmap = (struct isl_basic_map *) bset;
1953 bmap->n_out = n_out;
1954 return isl_basic_map_finalize(bmap);
1956 isl_basic_set_free(bset);
1960 struct isl_basic_set *isl_basic_set_from_basic_map(struct isl_basic_map *bmap)
1964 if (bmap->n_in == 0)
1965 return (struct isl_basic_set *)bmap;
1966 bmap = isl_basic_map_cow(bmap);
1969 bmap->n_out += bmap->n_in;
1971 bmap = isl_basic_map_finalize(bmap);
1972 return (struct isl_basic_set *)bmap;
1977 /* For a div d = floor(f/m), add the constraints
1980 * -(f-(n-1)) + m d >= 0
1982 * Note that the second constraint is the negation of
1986 static int add_div_constraints(struct isl_basic_map *bmap, unsigned div)
1989 unsigned div_pos = 1 + bmap->nparam + bmap->n_in + bmap->n_out + div;
1990 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra;
1992 i = isl_basic_map_alloc_inequality(bmap);
1995 isl_seq_cpy(bmap->ineq[i], bmap->div[div]+1, 1+total);
1996 isl_int_neg(bmap->ineq[i][div_pos], bmap->div[div][0]);
1998 j = isl_basic_map_alloc_inequality(bmap);
2001 isl_seq_neg(bmap->ineq[j], bmap->ineq[i], 1 + total);
2002 isl_int_add(bmap->ineq[j][0], bmap->ineq[j][0], bmap->ineq[j][div_pos]);
2003 isl_int_sub_ui(bmap->ineq[j][0], bmap->ineq[j][0], 1);
2007 struct isl_basic_set *isl_basic_map_underlying_set(
2008 struct isl_basic_map *bmap)
2012 if (bmap->nparam == 0 && bmap->n_in == 0 && bmap->n_div == 0)
2013 return (struct isl_basic_set *)bmap;
2014 bmap = isl_basic_map_cow(bmap);
2017 bmap->n_out += bmap->nparam + bmap->n_in + bmap->n_div;
2020 bmap->extra -= bmap->n_div;
2022 bmap = isl_basic_map_finalize(bmap);
2023 return (struct isl_basic_set *)bmap;
2028 struct isl_basic_map *isl_basic_map_overlying_set(
2029 struct isl_basic_set *bset, struct isl_basic_map *like)
2031 struct isl_basic_map *bmap;
2032 struct isl_ctx *ctx;
2039 isl_assert(ctx, bset->dim ==
2040 like->nparam + like->n_in + like->n_out + like->n_div,
2042 if (like->nparam == 0 && like->n_in == 0 && like->n_div == 0) {
2043 isl_basic_map_free(like);
2044 return (struct isl_basic_map *)bset;
2046 bset = isl_basic_set_cow(bset);
2047 total = bset->dim + bset->extra;
2050 bmap = (struct isl_basic_map *)bset;
2051 bmap->nparam = like->nparam;
2052 bmap->n_in = like->n_in;
2053 bmap->n_out = like->n_out;
2054 bmap->extra += like->n_div;
2057 ltotal = total - bmap->extra + like->extra;
2060 bmap->block2 = isl_blk_extend(ctx, bmap->block2,
2061 bmap->extra * (1 + 1 + total));
2062 if (isl_blk_is_error(bmap->block2))
2064 bmap->div = isl_realloc_array(ctx, bmap->div, isl_int *,
2068 bmap = isl_basic_map_extend(bmap, bmap->nparam,
2069 bmap->n_in, bmap->n_out, 0, 0, 2 * like->n_div);
2070 for (i = 0; i < like->n_div; ++i) {
2071 k = isl_basic_map_alloc_div(bmap);
2074 isl_seq_cpy(bmap->div[k], like->div[i], 1 + 1 + ltotal);
2075 isl_seq_clr(bmap->div[k]+1+1+ltotal, total - ltotal);
2076 if (add_div_constraints(bmap, k) < 0)
2080 isl_basic_map_free(like);
2081 bmap = isl_basic_map_finalize(bmap);
2084 isl_basic_map_free(like);
2085 isl_basic_set_free(bset);
2089 struct isl_set *isl_map_underlying_set(struct isl_map *map)
2093 map = isl_map_align_divs(map);
2094 map = isl_map_cow(map);
2098 for (i = 0; i < map->n; ++i) {
2099 map->p[i] = (struct isl_basic_map *)
2100 isl_basic_map_underlying_set(map->p[i]);
2105 map->n_out += map->nparam + map->n_in;
2107 map->n_out = map->p[0]->n_out;
2110 return (struct isl_set *)map;
2116 struct isl_basic_set *isl_basic_map_domain(struct isl_basic_map *bmap)
2118 struct isl_basic_set *domain;
2122 n_out = bmap->n_out;
2123 domain = isl_basic_set_from_basic_map(bmap);
2124 return isl_basic_set_project_out(domain, n_out, 0);
2127 struct isl_basic_set *isl_basic_map_range(struct isl_basic_map *bmap)
2129 return isl_basic_map_domain(isl_basic_map_reverse(bmap));
2132 struct isl_set *isl_map_range(struct isl_map *map)
2135 struct isl_set *set;
2139 map = isl_map_cow(map);
2143 set = (struct isl_set *) map;
2145 for (i = 0; i < map->n; ++i) {
2146 set->p[i] = isl_basic_map_range(map->p[i]);
2150 F_CLR(set, ISL_MAP_DISJOINT);
2157 struct isl_map *isl_map_from_set(struct isl_set *set,
2158 unsigned n_in, unsigned n_out)
2161 struct isl_map *map = NULL;
2165 isl_assert(set->ctx, set->dim == n_in + n_out, goto error);
2166 set = isl_set_cow(set);
2169 map = (struct isl_map *)set;
2170 for (i = 0; i < set->n; ++i) {
2171 map->p[i] = isl_basic_map_from_basic_set(
2172 set->p[i], n_in, n_out);
2184 struct isl_set *isl_set_from_map(struct isl_map *map)
2187 struct isl_set *set = NULL;
2191 map = isl_map_cow(map);
2194 map->n_out += map->n_in;
2196 set = (struct isl_set *)map;
2197 for (i = 0; i < map->n; ++i) {
2198 set->p[i] = isl_basic_set_from_basic_map(map->p[i]);
2208 struct isl_map *isl_map_alloc(struct isl_ctx *ctx,
2209 unsigned nparam, unsigned in, unsigned out, int n,
2212 struct isl_map *map;
2214 map = isl_alloc(ctx, struct isl_map,
2215 sizeof(struct isl_map) +
2216 n * sizeof(struct isl_basic_map *));
2225 map->nparam = nparam;
2232 struct isl_basic_map *isl_basic_map_empty(struct isl_ctx *ctx,
2233 unsigned nparam, unsigned in, unsigned out)
2235 struct isl_basic_map *bmap;
2236 bmap = isl_basic_map_alloc(ctx, nparam, in, out, 0, 1, 0);
2237 bmap = isl_basic_map_set_to_empty(bmap);
2241 struct isl_basic_set *isl_basic_set_empty(struct isl_ctx *ctx,
2242 unsigned nparam, unsigned dim)
2244 struct isl_basic_set *bset;
2245 bset = isl_basic_set_alloc(ctx, nparam, dim, 0, 1, 0);
2246 bset = isl_basic_set_set_to_empty(bset);
2250 struct isl_basic_map *isl_basic_map_universe(struct isl_ctx *ctx,
2251 unsigned nparam, unsigned in, unsigned out)
2253 struct isl_basic_map *bmap;
2254 bmap = isl_basic_map_alloc(ctx, nparam, in, out, 0, 0, 0);
2258 struct isl_basic_set *isl_basic_set_universe(struct isl_ctx *ctx,
2259 unsigned nparam, unsigned dim)
2261 struct isl_basic_set *bset;
2262 bset = isl_basic_set_alloc(ctx, nparam, dim, 0, 0, 0);
2266 struct isl_map *isl_map_empty(struct isl_ctx *ctx,
2267 unsigned nparam, unsigned in, unsigned out)
2269 return isl_map_alloc(ctx, nparam, in, out, 0, ISL_MAP_DISJOINT);
2272 struct isl_set *isl_set_empty(struct isl_ctx *ctx,
2273 unsigned nparam, unsigned dim)
2275 return isl_set_alloc(ctx, nparam, dim, 0, ISL_MAP_DISJOINT);
2278 struct isl_map *isl_map_dup(struct isl_map *map)
2281 struct isl_map *dup;
2285 dup = isl_map_alloc(map->ctx, map->nparam, map->n_in, map->n_out, map->n,
2287 for (i = 0; i < map->n; ++i)
2288 dup = isl_map_add(dup,
2289 isl_basic_map_dup(map->p[i]));
2293 struct isl_map *isl_map_add(struct isl_map *map, struct isl_basic_map *bmap)
2297 isl_assert(map->ctx, map->nparam == bmap->nparam, goto error);
2298 isl_assert(map->ctx, map->n_in == bmap->n_in, goto error);
2299 isl_assert(map->ctx, map->n_out == bmap->n_out, goto error);
2300 isl_assert(map->ctx, map->n < map->size, goto error);
2301 map->p[map->n] = bmap;
2308 isl_basic_map_free(bmap);
2312 void isl_map_free(struct isl_map *map)
2322 isl_ctx_deref(map->ctx);
2323 for (i = 0; i < map->n; ++i)
2324 isl_basic_map_free(map->p[i]);
2328 struct isl_map *isl_map_extend(struct isl_map *base,
2329 unsigned nparam, unsigned n_in, unsigned n_out)
2333 base = isl_map_cow(base);
2337 isl_assert(base->ctx, base->nparam <= nparam, goto error);
2338 isl_assert(base->ctx, base->n_in <= n_in, goto error);
2339 isl_assert(base->ctx, base->n_out <= n_out, goto error);
2340 base->nparam = nparam;
2342 base->n_out = n_out;
2343 for (i = 0; i < base->n; ++i) {
2344 base->p[i] = isl_basic_map_extend(base->p[i],
2345 nparam, n_in, n_out, 0, 0, 0);
2355 struct isl_set *isl_set_extend(struct isl_set *base,
2356 unsigned nparam, unsigned dim)
2358 return (struct isl_set *)isl_map_extend((struct isl_map *)base,
2362 static struct isl_basic_map *isl_basic_map_fix_var(struct isl_basic_map *bmap,
2363 unsigned var, int value)
2367 bmap = isl_basic_map_cow(bmap);
2368 bmap = isl_basic_map_extend(bmap,
2369 bmap->nparam, bmap->n_in, bmap->n_out, 0, 1, 0);
2370 j = isl_basic_map_alloc_equality(bmap);
2373 isl_seq_clr(bmap->eq[j],
2374 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra);
2375 isl_int_set_si(bmap->eq[j][1 + var], -1);
2376 isl_int_set_si(bmap->eq[j][0], value);
2377 bmap = isl_basic_map_simplify(bmap);
2378 return isl_basic_map_finalize(bmap);
2380 isl_basic_map_free(bmap);
2384 struct isl_basic_map *isl_basic_map_fix_input_si(struct isl_basic_map *bmap,
2385 unsigned input, int value)
2389 isl_assert(bmap->ctx, input < bmap->n_in, goto error);
2390 return isl_basic_map_fix_var(bmap, bmap->nparam + input, value);
2392 isl_basic_map_free(bmap);
2396 struct isl_basic_set *isl_basic_set_fix_dim_si(struct isl_basic_set *bset,
2397 unsigned dim, int value)
2401 isl_assert(bset->ctx, dim < bset->dim, goto error);
2402 return (struct isl_basic_set *)
2403 isl_basic_map_fix_var((struct isl_basic_map *)bset,
2404 bset->nparam + dim, value);
2406 isl_basic_set_free(bset);
2410 struct isl_map *isl_map_fix_input_si(struct isl_map *map,
2411 unsigned input, int value)
2415 map = isl_map_cow(map);
2419 isl_assert(ctx, input < map->n_in, goto error);
2420 for (i = 0; i < map->n; ++i) {
2421 map->p[i] = isl_basic_map_fix_input_si(map->p[i], input, value);
2431 struct isl_set *isl_set_fix_dim_si(struct isl_set *set, unsigned dim, int value)
2435 set = isl_set_cow(set);
2439 isl_assert(set->ctx, dim < set->dim, goto error);
2440 for (i = 0; i < set->n; ++i) {
2441 set->p[i] = isl_basic_set_fix_dim_si(set->p[i], dim, value);
2451 struct isl_map *isl_map_reverse(struct isl_map *map)
2456 map = isl_map_cow(map);
2461 map->n_in = map->n_out;
2463 for (i = 0; i < map->n; ++i) {
2464 map->p[i] = isl_basic_map_reverse(map->p[i]);
2474 struct isl_map *isl_basic_map_lexmax(
2475 struct isl_basic_map *bmap, struct isl_basic_set *dom,
2476 struct isl_set **empty)
2478 return isl_pip_basic_map_lexmax(bmap, dom, empty);
2481 struct isl_map *isl_basic_map_lexmin(
2482 struct isl_basic_map *bmap, struct isl_basic_set *dom,
2483 struct isl_set **empty)
2485 return isl_pip_basic_map_lexmin(bmap, dom, empty);
2488 struct isl_set *isl_basic_set_lexmin(struct isl_basic_set *bset)
2490 struct isl_basic_map *bmap = NULL;
2491 struct isl_basic_set *dom = NULL;
2492 struct isl_map *min;
2496 bmap = isl_basic_map_from_basic_set(bset, 0, bset->dim);
2499 dom = isl_basic_set_alloc(bmap->ctx, bmap->nparam, 0, 0, 0, 0);
2502 min = isl_basic_map_lexmin(bmap, dom, NULL);
2503 return isl_map_range(min);
2505 isl_basic_map_free(bmap);
2509 struct isl_map *isl_basic_map_compute_divs(struct isl_basic_map *bmap)
2513 if (bmap->n_div == 0)
2514 return isl_map_from_basic_map(bmap);
2515 return isl_pip_basic_map_compute_divs(bmap);
2518 struct isl_map *isl_map_compute_divs(struct isl_map *map)
2521 struct isl_map *res;
2527 res = isl_basic_map_compute_divs(isl_basic_map_copy(map->p[0]));
2528 for (i = 1 ; i < map->n; ++i) {
2530 r2 = isl_basic_map_compute_divs(isl_basic_map_copy(map->p[i]));
2531 if (F_ISSET(map, ISL_MAP_DISJOINT))
2532 res = isl_map_union_disjoint(res, r2);
2534 res = isl_map_union(res, r2);
2541 struct isl_set *isl_basic_set_compute_divs(struct isl_basic_set *bset)
2543 return (struct isl_set *)
2544 isl_basic_map_compute_divs((struct isl_basic_map *)bset);
2547 struct isl_set *isl_set_compute_divs(struct isl_set *set)
2549 return (struct isl_set *)
2550 isl_map_compute_divs((struct isl_map *)set);
2553 struct isl_set *isl_map_domain(struct isl_map *map)
2556 struct isl_set *set;
2561 map = isl_map_cow(map);
2565 set = (struct isl_set *)map;
2566 set->dim = map->n_in;
2568 for (i = 0; i < map->n; ++i) {
2569 set->p[i] = isl_basic_map_domain(map->p[i]);
2573 F_CLR(set, ISL_MAP_DISJOINT);
2580 struct isl_map *isl_map_union_disjoint(
2581 struct isl_map *map1, struct isl_map *map2)
2585 struct isl_map *map = NULL;
2599 isl_assert(map1->ctx, map1->nparam == map2->nparam, goto error);
2600 isl_assert(map1->ctx, map1->n_in == map2->n_in, goto error);
2601 isl_assert(map1->ctx, map1->n_out == map2->n_out, goto error);
2603 if (F_ISSET(map1, ISL_MAP_DISJOINT) &&
2604 F_ISSET(map2, ISL_MAP_DISJOINT))
2605 FL_SET(flags, ISL_MAP_DISJOINT);
2607 map = isl_map_alloc(map1->ctx, map1->nparam, map1->n_in, map1->n_out,
2608 map1->n + map2->n, flags);
2611 for (i = 0; i < map1->n; ++i) {
2612 map = isl_map_add(map,
2613 isl_basic_map_copy(map1->p[i]));
2617 for (i = 0; i < map2->n; ++i) {
2618 map = isl_map_add(map,
2619 isl_basic_map_copy(map2->p[i]));
2633 struct isl_map *isl_map_union(struct isl_map *map1, struct isl_map *map2)
2635 map1 = isl_map_union_disjoint(map1, map2);
2639 F_CLR(map1, ISL_MAP_DISJOINT);
2643 struct isl_set *isl_set_union_disjoint(
2644 struct isl_set *set1, struct isl_set *set2)
2646 return (struct isl_set *)
2647 isl_map_union_disjoint(
2648 (struct isl_map *)set1, (struct isl_map *)set2);
2651 struct isl_set *isl_set_union(struct isl_set *set1, struct isl_set *set2)
2653 return (struct isl_set *)
2654 isl_map_union((struct isl_map *)set1, (struct isl_map *)set2);
2657 struct isl_map *isl_map_intersect_range(
2658 struct isl_map *map, struct isl_set *set)
2661 struct isl_map *result;
2667 if (F_ISSET(map, ISL_MAP_DISJOINT) &&
2668 F_ISSET(set, ISL_MAP_DISJOINT))
2669 FL_SET(flags, ISL_MAP_DISJOINT);
2671 result = isl_map_alloc(map->ctx, map->nparam, map->n_in, map->n_out,
2672 map->n * set->n, flags);
2675 for (i = 0; i < map->n; ++i)
2676 for (j = 0; j < set->n; ++j) {
2677 result = isl_map_add(result,
2678 isl_basic_map_intersect_range(
2679 isl_basic_map_copy(map->p[i]),
2680 isl_basic_set_copy(set->p[j])));
2693 struct isl_map *isl_map_intersect_domain(
2694 struct isl_map *map, struct isl_set *set)
2696 return isl_map_reverse(
2697 isl_map_intersect_range(isl_map_reverse(map), set));
2700 struct isl_map *isl_map_apply_domain(
2701 struct isl_map *map1, struct isl_map *map2)
2705 map1 = isl_map_reverse(map1);
2706 map1 = isl_map_apply_range(map1, map2);
2707 return isl_map_reverse(map1);
2714 struct isl_map *isl_map_apply_range(
2715 struct isl_map *map1, struct isl_map *map2)
2717 struct isl_map *result;
2723 isl_assert(map1->ctx, map1->nparam == map2->nparam, goto error);
2724 isl_assert(map1->ctx, map1->n_out == map2->n_in, goto error);
2726 result = isl_map_alloc(map1->ctx, map1->nparam, map1->n_in, map2->n_out,
2727 map1->n * map2->n, 0);
2730 for (i = 0; i < map1->n; ++i)
2731 for (j = 0; j < map2->n; ++j) {
2732 result = isl_map_add(result,
2733 isl_basic_map_apply_range(
2734 isl_basic_map_copy(map1->p[i]),
2735 isl_basic_map_copy(map2->p[j])));
2741 if (result && result->n <= 1)
2742 F_SET(result, ISL_MAP_DISJOINT);
2751 * returns range - domain
2753 struct isl_basic_set *isl_basic_map_deltas(struct isl_basic_map *bmap)
2755 struct isl_basic_set *bset;
2761 isl_assert(bmap->ctx, bmap->n_in == bmap->n_out, goto error);
2763 bset = isl_basic_set_from_basic_map(bmap);
2764 bset = isl_basic_set_extend(bset, bset->nparam, 3*dim, 0,
2766 bset = isl_basic_set_swap_vars(bset, 2*dim);
2767 for (i = 0; i < dim; ++i) {
2768 int j = isl_basic_map_alloc_equality(
2769 (struct isl_basic_map *)bset);
2772 isl_seq_clr(bset->eq[j],
2773 1 + bset->nparam + bset->dim + bset->extra);
2774 isl_int_set_si(bset->eq[j][1+bset->nparam+i], 1);
2775 isl_int_set_si(bset->eq[j][1+bset->nparam+dim+i], 1);
2776 isl_int_set_si(bset->eq[j][1+bset->nparam+2*dim+i], -1);
2778 return isl_basic_set_project_out(bset, 2*dim, 0);
2780 isl_basic_map_free(bmap);
2784 /* If the only constraints a div d=floor(f/m)
2785 * appears in are its two defining constraints
2788 * -(f - (m - 1)) + m d >= 0
2790 * then it can safely be removed.
2792 static int div_is_redundant(struct isl_basic_map *bmap, int div)
2795 unsigned pos = 1 + bmap->nparam + bmap->n_in + bmap->n_out + div;
2797 for (i = 0; i < bmap->n_eq; ++i)
2798 if (!isl_int_is_zero(bmap->eq[i][pos]))
2801 for (i = 0; i < bmap->n_ineq; ++i) {
2802 if (isl_int_is_zero(bmap->ineq[i][pos]))
2804 if (isl_int_eq(bmap->ineq[i][pos], bmap->div[div][0])) {
2806 isl_int_sub(bmap->div[div][1],
2807 bmap->div[div][1], bmap->div[div][0]);
2808 isl_int_add_ui(bmap->div[div][1], bmap->div[div][1], 1);
2809 neg = isl_seq_is_neg(bmap->ineq[i], bmap->div[div]+1, pos);
2810 isl_int_sub_ui(bmap->div[div][1], bmap->div[div][1], 1);
2811 isl_int_add(bmap->div[div][1],
2812 bmap->div[div][1], bmap->div[div][0]);
2815 if (isl_seq_first_non_zero(bmap->ineq[i]+pos+1,
2816 bmap->n_div-div-1) != -1)
2818 } else if (isl_int_abs_eq(bmap->ineq[i][pos], bmap->div[div][0])) {
2819 if (!isl_seq_eq(bmap->ineq[i], bmap->div[div]+1, pos))
2821 if (isl_seq_first_non_zero(bmap->ineq[i]+pos+1,
2822 bmap->n_div-div-1) != -1)
2828 for (i = 0; i < bmap->n_div; ++i)
2829 if (!isl_int_is_zero(bmap->div[i][1+pos]))
2836 * Remove divs that don't occur in any of the constraints or other divs.
2837 * These can arise when dropping some of the variables in a quast
2838 * returned by piplib.
2840 static struct isl_basic_map *remove_redundant_divs(struct isl_basic_map *bmap)
2847 for (i = bmap->n_div-1; i >= 0; --i) {
2848 if (!div_is_redundant(bmap, i))
2850 bmap = isl_basic_map_drop_div(bmap, i);
2855 struct isl_basic_map *isl_basic_map_finalize(struct isl_basic_map *bmap)
2857 bmap = remove_redundant_divs(bmap);
2860 F_SET(bmap, ISL_BASIC_SET_FINAL);
2864 struct isl_basic_set *isl_basic_set_finalize(struct isl_basic_set *bset)
2866 return (struct isl_basic_set *)
2867 isl_basic_map_finalize((struct isl_basic_map *)bset);
2870 struct isl_set *isl_set_finalize(struct isl_set *set)
2876 for (i = 0; i < set->n; ++i) {
2877 set->p[i] = isl_basic_set_finalize(set->p[i]);
2887 struct isl_map *isl_map_finalize(struct isl_map *map)
2893 for (i = 0; i < map->n; ++i) {
2894 map->p[i] = isl_basic_map_finalize(map->p[i]);
2904 struct isl_basic_map *isl_basic_map_identity(struct isl_ctx *ctx,
2905 unsigned nparam, unsigned dim)
2907 struct isl_basic_map *bmap;
2910 bmap = isl_basic_map_alloc(ctx, nparam, dim, dim, 0, dim, 0);
2914 for (i = 0; i < dim; ++i) {
2915 int j = isl_basic_map_alloc_equality(bmap);
2918 isl_seq_clr(bmap->eq[j],
2919 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->extra);
2920 isl_int_set_si(bmap->eq[j][1+nparam+i], 1);
2921 isl_int_set_si(bmap->eq[j][1+nparam+dim+i], -1);
2923 return isl_basic_map_finalize(bmap);
2925 isl_basic_map_free(bmap);
2929 struct isl_map *isl_map_identity(struct isl_ctx *ctx,
2930 unsigned nparam, unsigned dim)
2932 struct isl_map *map = isl_map_alloc(ctx, nparam, dim, dim, 1,
2936 map = isl_map_add(map,
2937 isl_basic_map_identity(ctx, nparam, dim));
2944 int isl_set_is_equal(struct isl_set *set1, struct isl_set *set2)
2946 return isl_map_is_equal((struct isl_map *)set1, (struct isl_map *)set2);
2949 int isl_set_is_subset(struct isl_set *set1, struct isl_set *set2)
2951 return isl_map_is_subset(
2952 (struct isl_map *)set1, (struct isl_map *)set2);
2955 int isl_basic_map_is_subset(
2956 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
2959 struct isl_map *map1;
2960 struct isl_map *map2;
2962 if (!bmap1 || !bmap2)
2965 map1 = isl_map_from_basic_map(isl_basic_map_copy(bmap1));
2966 map2 = isl_map_from_basic_map(isl_basic_map_copy(bmap2));
2968 is_subset = isl_map_is_subset(map1, map2);
2976 int isl_basic_map_is_equal(
2977 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
2981 if (!bmap1 || !bmap2)
2983 is_subset = isl_basic_map_is_subset(bmap1, bmap2);
2986 is_subset = isl_basic_map_is_subset(bmap2, bmap1);
2990 int isl_basic_set_is_equal(
2991 struct isl_basic_set *bset1, struct isl_basic_set *bset2)
2993 return isl_basic_map_is_equal(
2994 (struct isl_basic_map *)bset1, (struct isl_basic_map *)bset2);
2997 int isl_map_is_empty(struct isl_map *map)
3004 for (i = 0; i < map->n; ++i) {
3005 is_empty = isl_basic_map_is_empty(map->p[i]);
3014 int isl_set_is_empty(struct isl_set *set)
3016 return isl_map_is_empty((struct isl_map *)set);
3019 int isl_map_is_subset(struct isl_map *map1, struct isl_map *map2)
3023 struct isl_map *diff;
3028 if (isl_map_is_empty(map1))
3031 if (isl_map_is_empty(map2))
3034 diff = isl_map_subtract(isl_map_copy(map1), isl_map_copy(map2));
3038 is_subset = isl_map_is_empty(diff);
3044 int isl_map_is_equal(struct isl_map *map1, struct isl_map *map2)
3050 is_subset = isl_map_is_subset(map1, map2);
3053 is_subset = isl_map_is_subset(map2, map1);
3057 int isl_basic_map_is_strict_subset(
3058 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
3062 if (!bmap1 || !bmap2)
3064 is_subset = isl_basic_map_is_subset(bmap1, bmap2);
3067 is_subset = isl_basic_map_is_subset(bmap2, bmap1);
3068 if (is_subset == -1)
3073 static int basic_map_contains(struct isl_basic_map *bmap, struct isl_vec *vec)
3079 total = 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
3080 if (total != vec->size)
3085 for (i = 0; i < bmap->n_eq; ++i) {
3086 isl_seq_inner_product(vec->block.data, bmap->eq[i], total, &s);
3087 if (!isl_int_is_zero(s)) {
3093 for (i = 0; i < bmap->n_ineq; ++i) {
3094 isl_seq_inner_product(vec->block.data, bmap->ineq[i], total, &s);
3095 if (isl_int_is_neg(s)) {
3106 int isl_basic_map_is_universe(struct isl_basic_map *bmap)
3110 return bmap->n_eq == 0 && bmap->n_ineq == 0;
3113 int isl_basic_map_is_empty(struct isl_basic_map *bmap)
3115 struct isl_basic_set *bset = NULL;
3116 struct isl_vec *sample = NULL;
3123 if (F_ISSET(bmap, ISL_BASIC_MAP_EMPTY))
3126 total = 1 + bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
3127 if (bmap->sample && bmap->sample->size == total) {
3128 int contains = basic_map_contains(bmap, bmap->sample);
3134 bset = isl_basic_map_underlying_set(isl_basic_map_copy(bmap));
3137 sample = isl_basic_set_sample(bset);
3140 empty = sample->size == 0;
3142 isl_vec_free(bmap->ctx, bmap->sample);
3143 bmap->sample = sample;
3148 struct isl_map *isl_basic_map_union(
3149 struct isl_basic_map *bmap1, struct isl_basic_map *bmap2)
3151 struct isl_map *map;
3152 if (!bmap1 || !bmap2)
3155 isl_assert(bmap1->ctx, bmap1->nparam == bmap2->nparam, goto error);
3156 isl_assert(bmap1->ctx, bmap1->n_in == bmap2->n_in, goto error);
3157 isl_assert(bmap1->ctx, bmap1->n_out == bmap2->n_out, goto error);
3159 map = isl_map_alloc(bmap1->ctx, bmap1->nparam,
3160 bmap1->n_in, bmap1->n_out, 2, 0);
3163 map = isl_map_add(map, bmap1);
3164 map = isl_map_add(map, bmap2);
3167 isl_basic_map_free(bmap1);
3168 isl_basic_map_free(bmap2);
3172 struct isl_set *isl_basic_set_union(
3173 struct isl_basic_set *bset1, struct isl_basic_set *bset2)
3175 return (struct isl_set *)isl_basic_map_union(
3176 (struct isl_basic_map *)bset1,
3177 (struct isl_basic_map *)bset2);
3180 /* Order divs such that any div only depends on previous divs */
3181 static struct isl_basic_map *order_divs(struct isl_basic_map *bmap)
3184 unsigned off = bmap->nparam + bmap->n_in + bmap->n_out;
3186 for (i = 0; i < bmap->n_div; ++i) {
3188 pos = isl_seq_first_non_zero(bmap->div[i]+1+1+off+i,
3192 swap_div(bmap, i, pos);
3198 static int find_div(struct isl_basic_map *dst,
3199 struct isl_basic_map *src, unsigned div)
3203 unsigned total = src->nparam + src->n_in + src->n_out + src->n_div;
3205 for (i = 0; i < dst->n_div; ++i)
3206 if (isl_seq_eq(dst->div[i], src->div[div], 1+1+total) &&
3207 isl_seq_first_non_zero(dst->div[i]+1+1+total,
3208 dst->n_div - src->n_div) == -1)
3213 struct isl_basic_map *isl_basic_map_align_divs(
3214 struct isl_basic_map *dst, struct isl_basic_map *src)
3217 unsigned total = src->nparam + src->n_in + src->n_out + src->n_div;
3219 if (src->n_div == 0)
3222 src = order_divs(src);
3223 dst = isl_basic_map_extend(dst, dst->nparam, dst->n_in,
3224 dst->n_out, src->n_div, 0, 2 * src->n_div);
3227 for (i = 0; i < src->n_div; ++i) {
3228 int j = find_div(dst, src, i);
3230 j = isl_basic_map_alloc_div(dst);
3233 isl_seq_cpy(dst->div[j], src->div[i], 1+1+total);
3234 isl_seq_clr(dst->div[j]+1+1+total,
3235 dst->extra - src->n_div);
3236 if (add_div_constraints(dst, j) < 0)
3240 swap_div(dst, i, j);
3244 isl_basic_map_free(dst);
3248 struct isl_map *isl_map_align_divs(struct isl_map *map)
3252 map = isl_map_compute_divs(map);
3253 map = isl_map_cow(map);
3257 for (i = 1; i < map->n; ++i)
3258 map->p[0] = isl_basic_map_align_divs(map->p[0], map->p[i]);
3259 for (i = 1; i < map->n; ++i)
3260 map->p[i] = isl_basic_map_align_divs(map->p[i], map->p[0]);
3265 static struct isl_map *add_cut_constraint(struct isl_map *dst,
3266 struct isl_basic_map *src, isl_int *c,
3267 unsigned len, int oppose)
3269 struct isl_basic_map *copy = NULL;
3274 copy = isl_basic_map_copy(src);
3275 copy = isl_basic_map_cow(copy);
3278 copy = isl_basic_map_extend(copy,
3279 copy->nparam, copy->n_in, copy->n_out, 0, 0, 1);
3280 k = isl_basic_map_alloc_inequality(copy);
3284 isl_seq_neg(copy->ineq[k], c, len);
3286 isl_seq_cpy(copy->ineq[k], c, len);
3287 total = 1 + copy->nparam + copy->n_in + copy->n_out + copy->extra;
3288 isl_seq_clr(copy->ineq[k]+len, total - len);
3289 isl_inequality_negate(copy, k);
3290 copy = isl_basic_map_simplify(copy);
3291 copy = isl_basic_map_finalize(copy);
3292 is_empty = isl_basic_map_is_empty(copy);
3296 dst = isl_map_add(dst, copy);
3298 isl_basic_map_free(copy);
3301 isl_basic_map_free(copy);
3306 static struct isl_map *subtract(struct isl_map *map, struct isl_basic_map *bmap)
3310 struct isl_map *rest = NULL;
3312 unsigned total = bmap->nparam + bmap->n_in + bmap->n_out + bmap->n_div;
3319 if (F_ISSET(map, ISL_MAP_DISJOINT))
3320 FL_SET(flags, ISL_MAP_DISJOINT);
3322 max = map->n * (2 * bmap->n_eq + bmap->n_ineq);
3323 rest = isl_map_alloc(map->ctx, map->nparam, map->n_in, map->n_out,
3328 for (i = 0; i < map->n; ++i) {
3329 map->p[i] = isl_basic_map_align_divs(map->p[i], bmap);
3334 for (j = 0; j < map->n; ++j)
3335 map->p[j] = isl_basic_map_cow(map->p[j]);
3337 for (i = 0; i < bmap->n_eq; ++i) {
3338 for (j = 0; j < map->n; ++j) {
3339 rest = add_cut_constraint(rest,
3340 map->p[j], bmap->eq[i], 1+total, 0);
3344 rest = add_cut_constraint(rest,
3345 map->p[j], bmap->eq[i], 1+total, 1);
3349 map->p[j] = isl_basic_map_extend(map->p[j],
3350 map->p[j]->nparam, map->p[j]->n_in,
3351 map->p[j]->n_out, 0, 1, 0);
3354 k = isl_basic_map_alloc_equality(map->p[j]);
3357 isl_seq_cpy(map->p[j]->eq[k], bmap->eq[i], 1+total);
3358 isl_seq_clr(map->p[j]->eq[k]+1+total,
3359 map->p[j]->extra - bmap->n_div);
3363 for (i = 0; i < bmap->n_ineq; ++i) {
3364 for (j = 0; j < map->n; ++j) {
3365 rest = add_cut_constraint(rest,
3366 map->p[j], bmap->ineq[i], 1+total, 0);
3370 map->p[j] = isl_basic_map_extend(map->p[j],
3371 map->p[j]->nparam, map->p[j]->n_in,
3372 map->p[j]->n_out, 0, 0, 1);
3375 k = isl_basic_map_alloc_inequality(map->p[j]);
3378 isl_seq_cpy(map->p[j]->ineq[k], bmap->ineq[i], 1+total);
3379 isl_seq_clr(map->p[j]->ineq[k]+1+total,
3380 map->p[j]->extra - bmap->n_div);
3392 struct isl_map *isl_map_subtract(struct isl_map *map1, struct isl_map *map2)
3398 isl_assert(map1->ctx, map1->nparam == map2->nparam, goto error);
3399 isl_assert(map1->ctx, map1->n_in == map2->n_in, goto error);
3400 isl_assert(map1->ctx, map1->n_out == map2->n_out, goto error);
3402 if (isl_map_is_empty(map2)) {
3407 map1 = isl_map_compute_divs(map1);
3408 map2 = isl_map_compute_divs(map2);
3412 for (i = 0; map1 && i < map2->n; ++i)
3413 map1 = subtract(map1, map2->p[i]);
3423 struct isl_set *isl_set_subtract(struct isl_set *set1, struct isl_set *set2)
3425 return (struct isl_set *)
3427 (struct isl_map *)set1, (struct isl_map *)set2);
3430 struct isl_set *isl_set_apply(struct isl_set *set, struct isl_map *map)
3434 isl_assert(set->ctx, set->dim == map->n_in, goto error);
3435 map = isl_map_intersect_domain(map, set);
3436 set = isl_map_range(map);
3444 /* There is no need to cow as removing empty parts doesn't change
3445 * the meaning of the set.
3447 struct isl_map *isl_map_remove_empty_parts(struct isl_map *map)
3454 for (i = map->n-1; i >= 0; --i) {
3455 if (!F_ISSET(map->p[i], ISL_BASIC_MAP_EMPTY))
3457 isl_basic_map_free(map->p[i]);
3459 map->p[i] = map->p[map->n-1];
3466 struct isl_set *isl_set_remove_empty_parts(struct isl_set *set)
3468 return (struct isl_set *)
3469 isl_map_remove_empty_parts((struct isl_map *)set);