/*
* Copyright 2008-2009 Katholieke Universiteit Leuven
+ * Copyright 2012 Ecole Normale Superieure
*
* Use of this software is governed by the GNU LGPLv2.1 license
*
* Written by Sven Verdoolaege, K.U.Leuven, Departement
* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
+ * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
*/
#include <strings.h>
#include <isl/map.h>
#include <isl/seq.h>
#include "isl_tab.h"
-#include <isl_dim_private.h>
+#include <isl_space_private.h>
#include <isl_mat_private.h>
static void swap_equality(struct isl_basic_map *bmap, int a, int b)
isl_assert(bset->ctx, first + n <= bset->dim->n_out, goto error);
- if (n == 0 && !isl_dim_get_tuple_name(bset->dim, isl_dim_set))
+ if (n == 0 && !isl_space_get_tuple_name(bset->dim, isl_dim_set))
return bset;
bset = isl_basic_set_cow(bset);
constraint_drop_vars(bset->div[i]+1+1+bset->dim->nparam+first, n,
(bset->dim->n_out-first-n)+bset->extra);
- bset->dim = isl_dim_drop_outputs(bset->dim, first, n);
+ bset->dim = isl_space_drop_outputs(bset->dim, first, n);
if (!bset->dim)
goto error;
isl_assert(set->ctx, first + n <= set->dim->n_out, goto error);
- if (n == 0 && !isl_dim_get_tuple_name(set->dim, isl_dim_set))
+ if (n == 0 && !isl_space_get_tuple_name(set->dim, isl_dim_set))
return set;
set = isl_set_cow(set);
if (!set)
goto error;
- set->dim = isl_dim_drop_outputs(set->dim, first, n);
+ set->dim = isl_space_drop_outputs(set->dim, first, n);
if (!set->dim)
goto error;
dim = isl_basic_map_dim(bmap, type);
isl_assert(bmap->ctx, first + n <= dim, goto error);
- if (n == 0 && !isl_dim_get_tuple_name(bmap->dim, type))
+ if (n == 0 && !isl_space_is_named_or_nested(bmap->dim, type))
return bmap;
bmap = isl_basic_map_cow(bmap);
goto error;
isl_basic_map_free_div(bmap, n);
} else
- bmap->dim = isl_dim_drop(bmap->dim, type, first, n);
+ bmap->dim = isl_space_drop_dims(bmap->dim, type, first, n);
if (!bmap->dim)
goto error;
isl_assert(map->ctx, first + n <= isl_map_dim(map, type), goto error);
- if (n == 0 && !isl_dim_get_tuple_name(map->dim, type))
+ if (n == 0 && !isl_space_get_tuple_name(map->dim, type))
return map;
map = isl_map_cow(map);
if (!map)
goto error;
- map->dim = isl_dim_drop(map->dim, type, first, n);
+ map->dim = isl_space_drop_dims(map->dim, type, first, n);
if (!map->dim)
goto error;
if (!bmap)
goto error;
- pos = 1 + isl_dim_total(bmap->dim) + div;
+ pos = 1 + isl_space_dim(bmap->dim, isl_dim_all) + div;
isl_assert(bmap->ctx, div < bmap->n_div, goto error);
(struct isl_basic_map *)bset);
}
+/* Remove any common factor in numerator and denominator of a div expression,
+ * not taking into account the constant term.
+ * That is, look for any div of the form
+ *
+ * floor((a + m f(x))/(m d))
+ *
+ * and replace it by
+ *
+ * floor((floor(a/m) + f(x))/d)
+ *
+ * The difference {a/m}/d in the argument satisfies 0 <= {a/m}/d < 1/d
+ * and can therefore not influence the result of the floor.
+ */
+static __isl_give isl_basic_map *normalize_div_expressions(
+ __isl_take isl_basic_map *bmap)
+{
+ int i;
+ isl_int gcd;
+ unsigned total = isl_basic_map_total_dim(bmap);
+
+ if (!bmap)
+ return NULL;
+ if (bmap->n_div == 0)
+ return bmap;
+
+ isl_int_init(gcd);
+ for (i = 0; i < bmap->n_div; ++i) {
+ if (isl_int_is_zero(bmap->div[i][0]))
+ continue;
+ isl_seq_gcd(bmap->div[i] + 2, total, &gcd);
+ isl_int_gcd(gcd, gcd, bmap->div[i][0]);
+ if (isl_int_is_one(gcd))
+ continue;
+ isl_int_fdiv_q(bmap->div[i][1], bmap->div[i][1], gcd);
+ isl_int_divexact(bmap->div[i][0], bmap->div[i][0], gcd);
+ isl_seq_scale_down(bmap->div[i] + 2, bmap->div[i] + 2, gcd,
+ total);
+ }
+ isl_int_clear(gcd);
+
+ return bmap;
+}
+
/* Assumes divs have been ordered if keep_divs is set.
*/
static void eliminate_var_using_equality(struct isl_basic_map *bmap,
unsigned pos, isl_int *eq, int keep_divs, int *progress)
{
unsigned total;
+ unsigned space_total;
int k;
int last_div;
total = isl_basic_map_total_dim(bmap);
- last_div = isl_seq_last_non_zero(eq + 1 + isl_dim_total(bmap->dim),
- bmap->n_div);
+ space_total = isl_space_dim(bmap->dim, isl_dim_all);
+ last_div = isl_seq_last_non_zero(eq + 1 + space_total, bmap->n_div);
for (k = 0; k < bmap->n_eq; ++k) {
if (bmap->eq[k] == eq)
continue;
static void eliminate_div(struct isl_basic_map *bmap, isl_int *eq,
unsigned div, int keep_divs)
{
- unsigned pos = isl_dim_total(bmap->dim) + div;
+ unsigned pos = isl_space_dim(bmap->dim, isl_dim_all) + div;
eliminate_var_using_equality(bmap, pos, eq, keep_divs, NULL);
{
int k;
int last_div;
- unsigned pos = isl_dim_total(bmap->dim) + div;
+ unsigned space_total = isl_space_dim(bmap->dim, isl_dim_all);
+ unsigned pos = space_total + div;
- last_div = isl_seq_last_non_zero(eq + 1 + isl_dim_total(bmap->dim),
- bmap->n_div);
+ last_div = isl_seq_last_non_zero(eq + 1 + space_total, bmap->n_div);
if (last_div < 0 || last_div <= div)
return 1;
if (!bmap)
return NULL;
- off = 1 + isl_dim_total(bmap->dim);
+ off = 1 + isl_space_dim(bmap->dim, isl_dim_all);
for (d = bmap->n_div - 1; d >= 0 ; --d) {
for (i = 0; i < bmap->n_eq; ++i) {
return NULL;
ctx = bmap->ctx;
- off = 1 + isl_dim_total(bmap->dim);
+ off = 1 + isl_space_dim(bmap->dim, isl_dim_all);
for (d = bmap->n_div - 1; d >= 0 ; --d) {
for (i = 0; i < bmap->n_eq; ++i)
if (!bmap || bmap->n_div <= 1)
return bmap;
- total_var = isl_dim_total(bmap->dim);
+ total_var = isl_space_dim(bmap->dim, isl_dim_all);
total = total_var + bmap->n_div;
ctx = bmap->ctx;
int i, j;
unsigned total;
- total = isl_dim_total(bmap->dim);
+ total = isl_space_dim(bmap->dim, isl_dim_all);
for (i = 0, j = bmap->n_div-1; i < bmap->n_eq; ++i) {
while (j >= 0 && isl_int_is_zero(bmap->eq[i][1 + total + j]))
--j;
if (ISL_F_ISSET(bmap, ISL_BASIC_MAP_NORMALIZED_DIVS))
return bmap;
- total = isl_dim_total(bmap->dim);
+ total = isl_space_dim(bmap->dim, isl_dim_all);
div_eq = n_pure_div_eq(bmap);
if (div_eq == 0)
return bmap;
needed++;
}
if (needed > dropped) {
- bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
+ bmap = isl_basic_map_extend_space(bmap, isl_space_copy(bmap->dim),
needed, needed, 0);
if (!bmap)
goto error;
static struct isl_basic_map *set_div_from_lower_bound(
struct isl_basic_map *bmap, int div, int ineq)
{
- unsigned total = 1 + isl_dim_total(bmap->dim);
+ unsigned total = 1 + isl_space_dim(bmap->dim, isl_dim_all);
isl_seq_neg(bmap->div[div] + 1, bmap->ineq[ineq], total + bmap->n_div);
isl_int_set(bmap->div[div][0], bmap->ineq[ineq][total + div]);
int div, int ineq)
{
int j;
- unsigned total = 1 + isl_dim_total(bmap->dim);
+ unsigned total = 1 + isl_space_dim(bmap->dim, isl_dim_all);
/* Not defined in terms of unknown divs */
for (j = 0; j < bmap->n_div; ++j) {
struct isl_basic_map *bmap, int k, int l, isl_int sum, int *progress)
{
int i;
- unsigned total = 1 + isl_dim_total(bmap->dim);
+ unsigned total = 1 + isl_space_dim(bmap->dim, isl_dim_all);
for (i = 0; i < bmap->n_div; ++i) {
if (!isl_int_is_zero(bmap->div[i][0]))
while (progress) {
progress = 0;
bmap = isl_basic_map_normalize_constraints(bmap);
+ bmap = normalize_div_expressions(bmap);
bmap = remove_duplicate_divs(bmap, &progress);
bmap = eliminate_divs_eq(bmap, &progress);
bmap = eliminate_divs_ineq(bmap, &progress);
if (!bmap)
return -1;
- pos = 1 + isl_dim_total(bmap->dim) + div;
+ pos = 1 + isl_space_dim(bmap->dim, isl_dim_all) + div;
if (isl_int_eq(constraint[pos], bmap->div[div][0])) {
int neg;
return 1;
}
+int isl_basic_set_is_div_constraint(__isl_keep isl_basic_set *bset,
+ isl_int *constraint, unsigned div)
+{
+ return isl_basic_map_is_div_constraint(bset, constraint, div);
+}
+
/* If the only constraints a div d=floor(f/m)
* appears in are its two defining constraints
static int div_is_redundant(struct isl_basic_map *bmap, int div)
{
int i;
- unsigned pos = 1 + isl_dim_total(bmap->dim) + div;
+ unsigned pos = 1 + isl_space_dim(bmap->dim, isl_dim_all) + div;
for (i = 0; i < bmap->n_eq; ++i)
if (!isl_int_is_zero(bmap->eq[i][pos]))
int d;
int i, j, k;
unsigned total;
+ int need_gauss = 0;
if (n == 0)
return bmap;
continue;
eliminate_var_using_equality(bmap, d, bmap->eq[i], 0, NULL);
isl_basic_map_drop_equality(bmap, i);
+ need_gauss = 1;
break;
}
if (i < bmap->n_eq)
bmap = remove_duplicate_constraints(bmap, NULL, 0);
bmap = isl_basic_map_gauss(bmap, NULL);
bmap = isl_basic_map_remove_redundancies(bmap);
+ need_gauss = 0;
if (!bmap)
goto error;
if (ISL_F_ISSET(bmap, ISL_BASIC_MAP_EMPTY))
}
}
ISL_F_CLR(bmap, ISL_BASIC_MAP_NORMALIZED);
+ if (need_gauss)
+ bmap = isl_basic_map_gauss(bmap, NULL);
return bmap;
error:
isl_basic_map_free(bmap);
(struct isl_basic_map *)bset, pos, n);
}
+/* Eliminate the specified n dimensions starting at first from the
+ * constraints, without removing the dimensions from the space.
+ * If the set is rational, the dimensions are eliminated using Fourier-Motzkin.
+ * Otherwise, they are projected out and the original space is restored.
+ */
+__isl_give isl_basic_map *isl_basic_map_eliminate(
+ __isl_take isl_basic_map *bmap,
+ enum isl_dim_type type, unsigned first, unsigned n)
+{
+ isl_space *space;
+
+ if (!bmap)
+ return NULL;
+ if (n == 0)
+ return bmap;
+
+ if (first + n > isl_basic_map_dim(bmap, type) || first + n < first)
+ isl_die(bmap->ctx, isl_error_invalid,
+ "index out of bounds", goto error);
+
+ if (ISL_F_ISSET(bmap, ISL_BASIC_MAP_RATIONAL)) {
+ first += isl_basic_map_offset(bmap, type) - 1;
+ bmap = isl_basic_map_eliminate_vars(bmap, first, n);
+ return isl_basic_map_finalize(bmap);
+ }
+
+ space = isl_basic_map_get_space(bmap);
+ bmap = isl_basic_map_project_out(bmap, type, first, n);
+ bmap = isl_basic_map_insert(bmap, type, first, n);
+ bmap = isl_basic_map_reset_space(bmap, space);
+ return bmap;
+error:
+ isl_basic_map_free(bmap);
+ return NULL;
+}
+
/* Don't assume equalities are in order, because align_divs
* may have changed the order of the divs.
*/
int d, i;
unsigned total;
- total = isl_dim_total(bmap->dim);
+ total = isl_space_dim(bmap->dim, isl_dim_all);
for (d = 0; d < total; ++d)
elim[d] = -1;
for (i = 0; i < bmap->n_eq; ++i) {
int copied = 0;
unsigned total;
- total = isl_dim_total(bmap->dim);
+ total = isl_space_dim(bmap->dim, isl_dim_all);
for (d = total - 1; d >= 0; --d) {
if (isl_int_is_zero(src[1+d]))
continue;
context_ineq = context->n_ineq;
combined = isl_basic_set_cow(isl_basic_set_copy(context));
combined = isl_basic_set_extend_constraints(combined, 0, bset->n_ineq);
- tab = isl_tab_from_basic_set(combined);
+ tab = isl_tab_from_basic_set(combined, 0);
for (i = 0; i < context_ineq; ++i)
if (isl_tab_freeze_constraint(tab, i) < 0)
goto error;
return bmap;
}
if (isl_basic_map_plain_is_empty(context)) {
- struct isl_dim *dim = isl_dim_copy(bmap->dim);
- isl_basic_map_free(context);
isl_basic_map_free(bmap);
- return isl_basic_map_universe(dim);
+ return context;
}
if (isl_basic_map_plain_is_empty(bmap)) {
isl_basic_map_free(context);
goto error;;
if (isl_basic_map_plain_is_empty(context)) {
- struct isl_dim *dim = isl_dim_copy(map->dim);
- isl_basic_map_free(context);
isl_map_free(map);
- return isl_map_universe(dim);
+ return isl_map_from_basic_map(context);
}
context = isl_basic_map_remove_redundancies(context);
map = isl_map_cow(map);
if (!map || !context)
goto error;;
- isl_assert(map->ctx, isl_dim_equal(map->dim, context->dim), goto error);
+ isl_assert(map->ctx, isl_space_is_equal(map->dim, context->dim), goto error);
map = isl_map_compute_divs(map);
for (i = 0; i < map->n; ++i)
context = isl_basic_map_align_divs(context, map->p[i]);
(struct isl_basic_map *)context);
}
+__isl_give isl_set *isl_set_gist_params_basic_set(__isl_take isl_set *set,
+ __isl_take isl_basic_set *context)
+{
+ isl_space *space = isl_set_get_space(set);
+ isl_basic_set *dom_context = isl_basic_set_universe(space);
+ dom_context = isl_basic_set_intersect_params(dom_context, context);
+ return isl_set_gist_basic_set(set, dom_context);
+}
+
__isl_give isl_set *isl_set_gist(__isl_take isl_set *set,
__isl_take isl_set *context)
{
(struct isl_map *)context);
}
+__isl_give isl_map *isl_map_gist_domain(__isl_take isl_map *map,
+ __isl_take isl_set *context)
+{
+ isl_map *map_context = isl_map_universe(isl_map_get_space(map));
+ map_context = isl_map_intersect_domain(map_context, context);
+ return isl_map_gist(map, map_context);
+}
+
+__isl_give isl_map *isl_map_gist_range(__isl_take isl_map *map,
+ __isl_take isl_set *context)
+{
+ isl_map *map_context = isl_map_universe(isl_map_get_space(map));
+ map_context = isl_map_intersect_range(map_context, context);
+ return isl_map_gist(map, map_context);
+}
+
+__isl_give isl_map *isl_map_gist_params(__isl_take isl_map *map,
+ __isl_take isl_set *context)
+{
+ isl_map *map_context = isl_map_universe(isl_map_get_space(map));
+ map_context = isl_map_intersect_params(map_context, context);
+ return isl_map_gist(map, map_context);
+}
+
+__isl_give isl_set *isl_set_gist_params(__isl_take isl_set *set,
+ __isl_take isl_set *context)
+{
+ return isl_map_gist_params(set, context);
+}
+
/* Quick check to see if two basic maps are disjoint.
* In particular, we reduce the equalities and inequalities of
* one basic map in the context of the equalities of the other
if (!bmap1 || !bmap2)
return -1;
- isl_assert(bmap1->ctx, isl_dim_equal(bmap1->dim, bmap2->dim),
+ isl_assert(bmap1->ctx, isl_space_is_equal(bmap1->dim, bmap2->dim),
return -1);
if (bmap1->n_div || bmap2->n_div)
return 0;
if (!bmap1->n_eq && !bmap2->n_eq)
return 0;
- total = isl_dim_total(bmap1->dim);
+ total = isl_space_dim(bmap1->dim, isl_dim_all);
if (total == 0)
return 0;
v = isl_vec_alloc(bmap1->ctx, 1 + total);
if (bmap->n_div <= 1)
return -1;
- dim = isl_dim_total(bmap->dim);
+ dim = isl_space_dim(bmap->dim, isl_dim_all);
if (isl_seq_first_non_zero(bmap->ineq[l] + 1 + dim, div) != -1)
return -1;
if (isl_seq_first_non_zero(bmap->ineq[l] + 1 + dim + div + 1,
int l, int u, isl_int *ineq, isl_int g, isl_int fl, isl_int fu)
{
unsigned dim;
- dim = isl_dim_total(bmap->dim);
+ dim = isl_space_dim(bmap->dim, isl_dim_all);
isl_int_gcd(g, bmap->ineq[l][1 + dim + i], bmap->ineq[u][1 + dim + i]);
isl_int_divexact(fl, bmap->ineq[l][1 + dim + i], g);
if (!bmap)
goto error;
- dim = isl_dim_total(bmap->dim);
+ dim = isl_space_dim(bmap->dim, isl_dim_all);
vec = isl_vec_alloc(bmap->ctx, 1 + dim + bmap->n_div);
if (!vec)
goto error;
- tab = isl_tab_from_basic_map(bmap);
+ tab = isl_tab_from_basic_map(bmap, 0);
while (n > 0) {
int i, l, u;
unsigned dim, total;
int i;
- dim = isl_dim_total(bmap->dim);
+ dim = isl_space_dim(bmap->dim, isl_dim_all);
total = 1 + dim + bmap->n_div;
isl_int_init(a);
int i, l, u;
unsigned dim;
- dim = isl_dim_total(bmap->dim);
+ dim = isl_space_dim(bmap->dim, isl_dim_all);
for (i = 0; i < bmap->n_div; ++i) {
if (!pairs[i])
if (!bmap)
goto error;
- off = isl_dim_total(bmap->dim);
+ off = isl_space_dim(bmap->dim, isl_dim_all);
pairs = isl_calloc_array(bmap->ctx, int, bmap->n_div);
if (!pairs)
goto error;
projects / platform / upstream / isl.git / blobdiff