/*
* Copyright 2010 INRIA Saclay
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
* Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
* 91893 Orsay, France
*/
#include <isl_ctx_private.h>
#include <isl_map_private.h>
#include <isl_bound.h>
#include <isl_bernstein.h>
#include <isl_range.h>
#include <isl_polynomial_private.h>
#include <isl_options_private.h>
/* Compute a bound on the polynomial defined over the parametric polytope
* using either range propagation or bernstein expansion and
* store the result in bound->pwf and bound->pwf_tight.
* Since bernstein expansion requires bounded domains, we apply
* range propagation on unbounded domains. Otherwise, we respect the choice
* of the user.
*/
static int compressed_guarded_poly_bound(__isl_take isl_basic_set *bset,
__isl_take isl_qpolynomial *poly, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
int bounded;
if (!bset || !poly)
goto error;
if (bset->ctx->opt->bound == ISL_BOUND_RANGE)
return isl_qpolynomial_bound_on_domain_range(bset, poly, bound);
bounded = isl_basic_set_is_bounded(bset);
if (bounded < 0)
goto error;
if (bounded)
return isl_qpolynomial_bound_on_domain_bernstein(bset, poly, bound);
else
return isl_qpolynomial_bound_on_domain_range(bset, poly, bound);
error:
isl_basic_set_free(bset);
isl_qpolynomial_free(poly);
return -1;
}
static int unwrapped_guarded_poly_bound(__isl_take isl_basic_set *bset,
__isl_take isl_qpolynomial *poly, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
isl_pw_qpolynomial_fold *top_pwf;
isl_pw_qpolynomial_fold *top_pwf_tight;
isl_space *dim;
isl_morph *morph;
int r;
bset = isl_basic_set_detect_equalities(bset);
if (!bset)
goto error;
if (bset->n_eq == 0)
return compressed_guarded_poly_bound(bset, poly, user);
morph = isl_basic_set_full_compression(bset);
bset = isl_morph_basic_set(isl_morph_copy(morph), bset);
poly = isl_qpolynomial_morph_domain(poly, isl_morph_copy(morph));
dim = isl_morph_get_ran_space(morph);
dim = isl_space_params(dim);
top_pwf = bound->pwf;
top_pwf_tight = bound->pwf_tight;
dim = isl_space_from_domain(dim);
dim = isl_space_add_dims(dim, isl_dim_out, 1);
bound->pwf = isl_pw_qpolynomial_fold_zero(isl_space_copy(dim),
bound->type);
bound->pwf_tight = isl_pw_qpolynomial_fold_zero(dim, bound->type);
r = compressed_guarded_poly_bound(bset, poly, user);
morph = isl_morph_dom_params(morph);
morph = isl_morph_ran_params(morph);
morph = isl_morph_inverse(morph);
bound->pwf = isl_pw_qpolynomial_fold_morph_domain(bound->pwf,
isl_morph_copy(morph));
bound->pwf_tight = isl_pw_qpolynomial_fold_morph_domain(
bound->pwf_tight, morph);
bound->pwf = isl_pw_qpolynomial_fold_fold(top_pwf, bound->pwf);
bound->pwf_tight = isl_pw_qpolynomial_fold_fold(top_pwf_tight,
bound->pwf_tight);
return r;
error:
isl_basic_set_free(bset);
isl_qpolynomial_free(poly);
return -1;
}
static int guarded_poly_bound(__isl_take isl_basic_set *bset,
__isl_take isl_qpolynomial *poly, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
isl_space *dim;
isl_pw_qpolynomial_fold *top_pwf;
isl_pw_qpolynomial_fold *top_pwf_tight;
int nparam;
int n_in;
int r;
if (!bound->wrapping)
return unwrapped_guarded_poly_bound(bset, poly, user);
nparam = isl_space_dim(bound->dim, isl_dim_param);
n_in = isl_space_dim(bound->dim, isl_dim_in);
bset = isl_basic_set_move_dims(bset, isl_dim_param, nparam,
isl_dim_set, 0, n_in);
poly = isl_qpolynomial_move_dims(poly, isl_dim_param, nparam,
isl_dim_in, 0, n_in);
dim = isl_basic_set_get_space(bset);
dim = isl_space_params(dim);
top_pwf = bound->pwf;
top_pwf_tight = bound->pwf_tight;
dim = isl_space_from_domain(dim);
dim = isl_space_add_dims(dim, isl_dim_out, 1);
bound->pwf = isl_pw_qpolynomial_fold_zero(isl_space_copy(dim),
bound->type);
bound->pwf_tight = isl_pw_qpolynomial_fold_zero(dim, bound->type);
r = unwrapped_guarded_poly_bound(bset, poly, user);
bound->pwf = isl_pw_qpolynomial_fold_reset_space(bound->pwf,
isl_space_copy(bound->dim));
bound->pwf_tight = isl_pw_qpolynomial_fold_reset_space(bound->pwf_tight,
isl_space_copy(bound->dim));
bound->pwf = isl_pw_qpolynomial_fold_fold(top_pwf, bound->pwf);
bound->pwf_tight = isl_pw_qpolynomial_fold_fold(top_pwf_tight,
bound->pwf_tight);
return r;
}
static isl_stat guarded_qp(__isl_take isl_qpolynomial *qp, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
isl_stat r;
r = isl_qpolynomial_as_polynomial_on_domain(qp, bound->bset,
&guarded_poly_bound, user);
isl_qpolynomial_free(qp);
return r;
}
static isl_stat basic_guarded_fold(__isl_take isl_basic_set *bset, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
isl_stat r;
bound->bset = bset;
r = isl_qpolynomial_fold_foreach_qpolynomial(bound->fold,
&guarded_qp, user);
isl_basic_set_free(bset);
return r;
}
static isl_stat guarded_fold(__isl_take isl_set *set,
__isl_take isl_qpolynomial_fold *fold, void *user)
{
struct isl_bound *bound = (struct isl_bound *)user;
if (!set || !fold)
goto error;
set = isl_set_make_disjoint(set);
bound->fold = fold;
bound->type = isl_qpolynomial_fold_get_type(fold);
if (isl_set_foreach_basic_set(set, &basic_guarded_fold, bound) < 0)
goto error;
isl_set_free(set);
isl_qpolynomial_fold_free(fold);
return isl_stat_ok;
error:
isl_set_free(set);
isl_qpolynomial_fold_free(fold);
return isl_stat_error;
}
__isl_give isl_pw_qpolynomial_fold *isl_pw_qpolynomial_fold_bound(
__isl_take isl_pw_qpolynomial_fold *pwf, int *tight)
{
unsigned nvar;
struct isl_bound bound;
int covers;
if (!pwf)
return NULL;
bound.dim = isl_pw_qpolynomial_fold_get_domain_space(pwf);
bound.wrapping = isl_space_is_wrapping(bound.dim);
if (bound.wrapping)
bound.dim = isl_space_unwrap(bound.dim);
nvar = isl_space_dim(bound.dim, isl_dim_out);
bound.dim = isl_space_domain(bound.dim);
bound.dim = isl_space_from_domain(bound.dim);
bound.dim = isl_space_add_dims(bound.dim, isl_dim_out, 1);
if (nvar == 0) {
if (tight)
*tight = 1;
return isl_pw_qpolynomial_fold_reset_space(pwf, bound.dim);
}
if (isl_pw_qpolynomial_fold_is_zero(pwf)) {
enum isl_fold type = pwf->type;
isl_pw_qpolynomial_fold_free(pwf);
if (tight)
*tight = 1;
return isl_pw_qpolynomial_fold_zero(bound.dim, type);
}
bound.pwf = isl_pw_qpolynomial_fold_zero(isl_space_copy(bound.dim),
pwf->type);
bound.pwf_tight = isl_pw_qpolynomial_fold_zero(isl_space_copy(bound.dim),
pwf->type);
bound.check_tight = !!tight;
if (isl_pw_qpolynomial_fold_foreach_lifted_piece(pwf,
guarded_fold, &bound) < 0)
goto error;
covers = isl_pw_qpolynomial_fold_covers(bound.pwf_tight, bound.pwf);
if (covers < 0)
goto error;
if (tight)
*tight = covers;
isl_space_free(bound.dim);
isl_pw_qpolynomial_fold_free(pwf);
if (covers) {
isl_pw_qpolynomial_fold_free(bound.pwf);
return bound.pwf_tight;
}
bound.pwf = isl_pw_qpolynomial_fold_fold(bound.pwf, bound.pwf_tight);
return bound.pwf;
error:
isl_pw_qpolynomial_fold_free(bound.pwf_tight);
isl_pw_qpolynomial_fold_free(bound.pwf);
isl_pw_qpolynomial_fold_free(pwf);
isl_space_free(bound.dim);
return NULL;
}
__isl_give isl_pw_qpolynomial_fold *isl_pw_qpolynomial_bound(
__isl_take isl_pw_qpolynomial *pwqp, enum isl_fold type, int *tight)
{
isl_pw_qpolynomial_fold *pwf;
pwf = isl_pw_qpolynomial_fold_from_pw_qpolynomial(type, pwqp);
return isl_pw_qpolynomial_fold_bound(pwf, tight);
}
struct isl_union_bound_data {
enum isl_fold type;
int tight;
isl_union_pw_qpolynomial_fold *res;
};
static isl_stat bound_pw(__isl_take isl_pw_qpolynomial *pwqp, void *user)
{
struct isl_union_bound_data *data = user;
isl_pw_qpolynomial_fold *pwf;
pwf = isl_pw_qpolynomial_bound(pwqp, data->type,
data->tight ? &data->tight : NULL);
data->res = isl_union_pw_qpolynomial_fold_fold_pw_qpolynomial_fold(
data->res, pwf);
return isl_stat_ok;
}
__isl_give isl_union_pw_qpolynomial_fold *isl_union_pw_qpolynomial_bound(
__isl_take isl_union_pw_qpolynomial *upwqp,
enum isl_fold type, int *tight)
{
isl_space *dim;
struct isl_union_bound_data data = { type, 1, NULL };
if (!upwqp)
return NULL;
if (!tight)
data.tight = 0;
dim = isl_union_pw_qpolynomial_get_space(upwqp);
data.res = isl_union_pw_qpolynomial_fold_zero(dim, type);
if (isl_union_pw_qpolynomial_foreach_pw_qpolynomial(upwqp,
&bound_pw, &data) < 0)
goto error;
isl_union_pw_qpolynomial_free(upwqp);
if (tight)
*tight = data.tight;
return data.res;
error:
isl_union_pw_qpolynomial_free(upwqp);
isl_union_pw_qpolynomial_fold_free(data.res);
return NULL;
}