}
+/* Remove any div that is defined in terms of the given variable.
+ */
+static struct isl_basic_map *remove_dependent_vars(struct isl_basic_map *bmap,
+ int pos)
+{
+ int i;
+ unsigned dim = isl_dim_total(bmap->dim);
+
+ for (i = 0; i < bmap->n_div; ++i) {
+ if (isl_int_is_zero(bmap->div[i][0]))
+ continue;
+ if (isl_int_is_zero(bmap->div[i][1+1+pos]))
+ continue;
+ bmap = isl_basic_map_eliminate_vars(bmap, dim + i, 1);
+ if (!bmap)
+ return NULL;
+ }
+ return bmap;
+}
+
+
/* Eliminate the specified variables from the constraints using
* Fourier-Motzkin. The variables themselves are not removed.
*/
struct isl_basic_map *isl_basic_map_eliminate_vars(
- struct isl_basic_map *bmap, int pos, unsigned n)
+ struct isl_basic_map *bmap, unsigned pos, unsigned n)
{
int d;
int i, j, k;
total = isl_basic_map_total_dim(bmap);
bmap = isl_basic_map_cow(bmap);
- for (d = pos + n - 1; d >= pos; --d) {
+ for (d = pos + n - 1; d >= 0 && d >= pos; --d) {
int n_lower, n_upper;
+ bmap = remove_dependent_vars(bmap, d);
if (!bmap)
return NULL;
+ if (d >= total - bmap->n_div)
+ isl_seq_clr(bmap->div[d-(total-bmap->n_div)], 2+total);
for (i = 0; i < bmap->n_eq; ++i) {
if (isl_int_is_zero(bmap->eq[i][1+d]))
continue;
struct isl_basic_map *bmap;
struct isl_ctx *ctx;
unsigned total;
- int i, k;
+ int i;
if (!bset || !like)
goto error;
ctx = bset->ctx;
+ isl_assert(ctx, bset->n_div == 0, goto error);
+ isl_assert(ctx, isl_basic_set_n_param(bset) == 0, goto error);
isl_assert(ctx, bset->dim->n_out == isl_basic_map_total_dim(like),
goto error);
if (isl_dim_equal(bset->dim, like->dim) && like->n_div == 0) {
bmap->dim = isl_dim_copy(like->dim);
if (!bmap->dim)
goto error;
+ bmap->n_div = like->n_div;
bmap->extra += like->n_div;
if (bmap->extra) {
unsigned ltotal;
bmap->extra);
if (!bmap->div)
goto error;
+ for (i = 0; i < bmap->extra; ++i)
+ bmap->div[i] = bmap->block2.data + i * (1 + 1 + total);
+ for (i = 0; i < like->n_div; ++i) {
+ isl_seq_cpy(bmap->div[i], like->div[i], 1 + 1 + ltotal);
+ isl_seq_clr(bmap->div[i]+1+1+ltotal, total - ltotal);
+ }
bmap = isl_basic_map_extend_constraints(bmap,
0, 2 * like->n_div);
- for (i = 0; i < like->n_div; ++i) {
- k = isl_basic_map_alloc_div(bmap);
- if (k < 0)
+ for (i = 0; i < like->n_div; ++i)
+ if (add_div_constraints(bmap, i) < 0)
goto error;
- isl_seq_cpy(bmap->div[k], like->div[i], 1 + 1 + ltotal);
- isl_seq_clr(bmap->div[k]+1+1+ltotal, total - ltotal);
- if (add_div_constraints(bmap, k) < 0)
- goto error;
- }
}
isl_basic_map_free(like);
bmap = isl_basic_map_finalize(bmap);
{
int i;
- map = isl_map_align_divs(map);
map = isl_map_cow(map);
if (!map)
return NULL;
if (!map->dim)
goto error;
+ for (i = 1; i < map->n; ++i)
+ isl_assert(map->ctx, map->p[0]->n_div == map->p[i]->n_div,
+ goto error);
for (i = 0; i < map->n; ++i) {
map->p[i] = (struct isl_basic_map *)
isl_basic_map_underlying_set(map->p[i]);
struct isl_map *isl_basic_map_compute_divs(struct isl_basic_map *bmap)
{
+ int i;
+ unsigned off;
+
if (!bmap)
return NULL;
- if (bmap->n_div == 0)
- return isl_map_from_basic_map(bmap);
- return isl_pip_basic_map_compute_divs(bmap);
+ off = isl_dim_total(bmap->dim);
+ for (i = 0; i < bmap->n_div; ++i) {
+ if (isl_int_is_zero(bmap->div[i][0]))
+ return isl_pip_basic_map_compute_divs(bmap);
+ isl_assert(bmap->ctx, isl_int_is_zero(bmap->div[i][1+1+off+i]),
+ goto error);
+ }
+ return isl_map_from_basic_map(bmap);
+error:
+ isl_basic_map_free(bmap);
+ return NULL;
}
struct isl_map *isl_map_compute_divs(struct isl_map *map)
return bmap;
}
+/* Look for a div in dst that corresponds to the div "div" in src.
+ * The divs before "div" in src and dst are assumed to be the same.
+ *
+ * Returns -1 if no corresponding div was found and the position
+ * of the corresponding div in dst otherwise.
+ */
static int find_div(struct isl_basic_map *dst,
struct isl_basic_map *src, unsigned div)
{
int i;
- unsigned total = isl_basic_map_total_dim(src);
+ unsigned total = isl_dim_total(src->dim);
- for (i = 0; i < dst->n_div; ++i)
- if (isl_seq_eq(dst->div[i], src->div[div], 1+1+total) &&
- isl_seq_first_non_zero(dst->div[i]+1+1+total,
- dst->n_div - src->n_div) == -1)
+ isl_assert(dst->ctx, div <= dst->n_div, return -1);
+ for (i = div; i < dst->n_div; ++i)
+ if (isl_seq_eq(dst->div[i], src->div[div], 1+1+total+div) &&
+ isl_seq_first_non_zero(dst->div[i]+1+1+total+div,
+ dst->n_div - div) == -1)
return i;
return -1;
}
struct isl_basic_map *dst, struct isl_basic_map *src)
{
int i;
- unsigned total = isl_basic_map_total_dim(src);
+ unsigned total = isl_dim_total(src->dim);
if (!dst || !src)
goto error;
j = isl_basic_map_alloc_div(dst);
if (j < 0)
goto error;
- isl_seq_cpy(dst->div[j], src->div[i], 1+1+total);
- isl_seq_clr(dst->div[j]+1+1+total,
- dst->n_div - src->n_div);
+ isl_seq_cpy(dst->div[j], src->div[i], 1+1+total+i);
+ isl_seq_clr(dst->div[j]+1+1+total+i, dst->n_div - i);
if (add_div_constraints(dst, j) < 0)
goto error;
}
bmap1 = isl_basic_map_extend(bmap1, nparam,
pos, (dim1 - pos) + (dim2 - pos),
bmap2->n_div, bmap2->n_eq, bmap2->n_ineq);
+ bmap1 = add_constraints(bmap1, bmap2, 0, dim1 - pos);
if (!bmap1)
goto error;
total = isl_basic_map_total_dim(bmap1);
isl_int_set_si(obj->block.data[nparam+pos+(dim1-pos)], -1);
if (!obj)
goto error;
- bmap1 = add_constraints(bmap1, bmap2, 0, dim1 - pos);
isl_int_init(num);
isl_int_init(den);
res = isl_solve_lp(bmap1, 0, obj->block.data, ctx->one, &num, &den);
return NULL;
}
+/*
+ * Assumes context has no implicit divs.
+ */
struct isl_map *isl_map_gist(struct isl_map *map, struct isl_basic_map *context)
{
int i;
if (!map || !context)
return NULL;
isl_assert(map->ctx, isl_dim_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]);
for (i = 0; i < map->n; ++i) {
projects / platform / upstream / isl.git / blobdiff