bound.c

   1 #include <assert.h>
   2 #include <isl/stream.h>
   3 #include <isl_polynomial_private.h>
   4 #include <isl_scan.h>
   5
   6 struct bound_options {
   7         struct isl_options      *isl;
   8         unsigned                 verify;
   9         int                      print_all;
  10         int                      continue_on_error;
  11 };
  12
  13 struct isl_arg bound_options_arg[] = {
  14 ISL_ARG_CHILD(struct bound_options, isl, "isl", isl_options_arg, "isl options")
  15 ISL_ARG_BOOL(struct bound_options, verify, 'T', "verify", 0, NULL)
  16 ISL_ARG_BOOL(struct bound_options, print_all, 'A', "print-all", 0, NULL)
  17 ISL_ARG_BOOL(struct bound_options, continue_on_error, '\0', "continue-on-error", 0, NULL)
  18 ISL_ARG_END
  19 };
  20
  21 ISL_ARG_DEF(bound_options, struct bound_options, bound_options_arg)
  22
  23 static __isl_give isl_set *set_bounds(__isl_take isl_set *set)
  24 {
  25         unsigned nparam;
  26         int i, r;
  27         isl_point *pt, *pt2;
  28         isl_set *box;
  29
  30         nparam = isl_set_dim(set, isl_dim_param);
  31         r = nparam >= 8 ? 5 : nparam >= 5 ? 15 : 50;
  32
  33         pt = isl_set_sample_point(isl_set_copy(set));
  34         pt2 = isl_point_copy(pt);
  35
  36         for (i = 0; i < nparam; ++i) {
  37                 pt = isl_point_add_ui(pt, isl_dim_param, i, r);
  38                 pt2 = isl_point_sub_ui(pt2, isl_dim_param, i, r);
  39         }
  40
  41         box = isl_set_box_from_points(pt, pt2);
  42
  43         return isl_set_intersect(set, box);
  44 }
  45
  46 struct verify_point_bound {
  47         struct bound_options *options;
  48         int stride;
  49         int n;
  50         int exact;
  51         int error;
  52
  53         isl_pw_qpolynomial_fold *pwf;
  54         isl_pw_qpolynomial_fold *bound;
  55 };
  56
  57 static int verify_point(__isl_take isl_point *pnt, void *user)
  58 {
  59         int i;
  60         unsigned nparam;
  61         struct verify_point_bound *vpb = (struct verify_point_bound *) user;
  62         isl_int t;
  63         isl_pw_qpolynomial_fold *pwf;
  64         isl_qpolynomial *bound = NULL;
  65         isl_qpolynomial *opt = NULL;
  66         isl_set *dom = NULL;
  67         const char *minmax;
  68         int bounded;
  69         int sign;
  70         int ok;
  71         FILE *out = vpb->options->print_all ? stdout : stderr;
  72
  73         vpb->n--;
  74
  75         if (1) {
  76                 minmax = "ub";
  77                 sign = 1;
  78         } else {
  79                 minmax = "lb";
  80                 sign = -1;
  81         }
  82
  83         isl_int_init(t);
  84
  85         pwf = isl_pw_qpolynomial_fold_copy(vpb->pwf);
  86
  87         nparam = isl_pw_qpolynomial_fold_dim(pwf, isl_dim_param);
  88         for (i = 0; i < nparam; ++i) {
  89                 isl_point_get_coordinate(pnt, isl_dim_param, i, &t);
  90                 pwf = isl_pw_qpolynomial_fold_fix_dim(pwf, isl_dim_param, i, t);
  91         }
  92
  93         bound = isl_pw_qpolynomial_fold_eval(
  94                                     isl_pw_qpolynomial_fold_copy(vpb->bound),
  95                                     isl_point_copy(pnt));
  96
  97         dom = isl_pw_qpolynomial_fold_domain(isl_pw_qpolynomial_fold_copy(pwf));
  98         bounded = isl_set_is_bounded(dom);
  99
 100         if (bounded < 0)
 101                 goto error;
 102
 103         if (!bounded)
 104                 opt = isl_pw_qpolynomial_fold_eval(
 105                                     isl_pw_qpolynomial_fold_copy(pwf),
 106                                     isl_set_sample_point(isl_set_copy(dom)));
 107         else if (sign > 0)
 108                 opt = isl_pw_qpolynomial_fold_max(isl_pw_qpolynomial_fold_copy(pwf));
 109         else
 110                 opt = isl_pw_qpolynomial_fold_min(isl_pw_qpolynomial_fold_copy(pwf));
 111
 112         if (vpb->exact && bounded)
 113                 ok = isl_qpolynomial_is_equal(opt, bound);
 114         else if (sign > 0)
 115                 ok = isl_qpolynomial_le_cst(opt, bound);
 116         else
 117                 ok = isl_qpolynomial_le_cst(bound, opt);
 118         if (ok < 0)
 119                 goto error;
 120
 121         if (vpb->options->print_all || !ok) {
 122                 fprintf(out, "%s(", minmax);
 123                 for (i = 0; i < nparam; ++i) {
 124                         if (i)
 125                                 fprintf(out, ", ");
 126                         isl_point_get_coordinate(pnt, isl_dim_param, i, &t);
 127                         isl_int_print(out, t, 0);
 128                 }
 129                 fprintf(out, ") = ");
 130                 isl_qpolynomial_print(bound, out, ISL_FORMAT_ISL);
 131                 fprintf(out, ", %s = ", bounded ? "opt" : "sample");
 132                 isl_qpolynomial_print(opt, out, ISL_FORMAT_ISL);
 133                 if (ok)
 134                         fprintf(out, ". OK\n");
 135                 else
 136                         fprintf(out, ". NOT OK\n");
 137         } else if ((vpb->n % vpb->stride) == 0) {
 138                 printf("o");
 139                 fflush(stdout);
 140         }
 141
 142         if (0) {
 143 error:
 144                 ok = 0;
 145         }
 146
 147         isl_pw_qpolynomial_fold_free(pwf);
 148         isl_qpolynomial_free(bound);
 149         isl_qpolynomial_free(opt);
 150         isl_point_free(pnt);
 151         isl_set_free(dom);
 152
 153         isl_int_clear(t);
 154
 155         if (!ok)
 156                 vpb->error = 1;
 157
 158         if (vpb->options->continue_on_error)
 159                 ok = 1;
 160
 161         return (vpb->n >= 1 && ok) ? 0 : -1;
 162 }
 163
 164 static int check_solution(__isl_take isl_pw_qpolynomial_fold *pwf,
 165         __isl_take isl_pw_qpolynomial_fold *bound, int exact,
 166         struct bound_options *options)
 167 {
 168         struct verify_point_bound vpb;
 169         isl_int count, max;
 170         isl_set *dom;
 171         isl_set *context;
 172         int i, r, n;
 173
 174         dom = isl_pw_qpolynomial_fold_domain(isl_pw_qpolynomial_fold_copy(pwf));
 175         context = isl_set_remove_dims(isl_set_copy(dom), isl_dim_set,
 176                                         0, isl_set_dim(dom, isl_dim_set));
 177         context = isl_set_remove_divs(context);
 178         context = set_bounds(context);
 179
 180         isl_int_init(count);
 181         isl_int_init(max);
 182
 183         isl_int_set_si(max, 200);
 184         r = isl_set_count_upto(context, max, &count);
 185         assert(r >= 0);
 186         n = isl_int_get_si(count);
 187
 188         isl_int_clear(max);
 189         isl_int_clear(count);
 190
 191         vpb.options = options;
 192         vpb.pwf = pwf;
 193         vpb.bound = bound;
 194         vpb.n = n;
 195         vpb.stride = n > 70 ? 1 + (n + 1)/70 : 1;
 196         vpb.error = 0;
 197         vpb.exact = exact;
 198
 199         if (!options->print_all) {
 200                 for (i = 0; i < vpb.n; i += vpb.stride)
 201                         printf(".");
 202                 printf("\r");
 203                 fflush(stdout);
 204         }
 205
 206         isl_set_foreach_point(context, verify_point, &vpb);
 207
 208         isl_set_free(context);
 209         isl_set_free(dom);
 210         isl_pw_qpolynomial_fold_free(pwf);
 211         isl_pw_qpolynomial_fold_free(bound);
 212
 213         if (!options->print_all)
 214                 printf("\n");
 215
 216         if (vpb.error) {
 217                 fprintf(stderr, "Check failed !\n");
 218                 return -1;
 219         }
 220
 221         return 0;
 222 }
 223
 224 int main(int argc, char **argv)
 225 {
 226         isl_ctx *ctx;
 227         isl_pw_qpolynomial_fold *copy;
 228         isl_pw_qpolynomial_fold *pwf;
 229         struct isl_stream *s;
 230         struct isl_obj obj;
 231         struct bound_options *options;
 232         int exact;
 233         int r = 0;
 234
 235         options = bound_options_new_with_defaults();
 236         assert(options);
 237         argc = bound_options_parse(options, argc, argv, ISL_ARG_ALL);
 238
 239         ctx = isl_ctx_alloc_with_options(bound_options_arg, options);
 240
 241         s = isl_stream_new_file(ctx, stdin);
 242         obj = isl_stream_read_obj(s);
 243         if (obj.type == isl_obj_pw_qpolynomial)
 244                 pwf = isl_pw_qpolynomial_fold_from_pw_qpolynomial(isl_fold_max,
 245                                                                   obj.v);
 246         else if (obj.type == isl_obj_pw_qpolynomial_fold)
 247                 pwf = obj.v;
 248         else {
 249                 obj.type->free(obj.v);
 250                 isl_die(ctx, isl_error_invalid, "invalid input", goto error);
 251         }
 252
 253         if (options->verify)
 254                 copy = isl_pw_qpolynomial_fold_copy(pwf);
 255
 256         pwf = isl_pw_qpolynomial_fold_bound(pwf, &exact);
 257         pwf = isl_pw_qpolynomial_fold_coalesce(pwf);
 258
 259         if (options->verify) {
 260                 r = check_solution(copy, pwf, exact, options);
 261         } else {
 262                 if (!exact)
 263                         printf("# NOT exact\n");
 264                 isl_pw_qpolynomial_fold_print(pwf, stdout, 0);
 265                 fprintf(stdout, "\n");
 266                 isl_pw_qpolynomial_fold_free(pwf);
 267         }
 268
 269 error:
 270         isl_stream_free(s);
 271
 272         isl_ctx_free(ctx);
 273
 274         return r;
 275 }