/* If the id has a negative refcount, then it is a static isl_id
* and should not be freed.
*/
void *isl_id_free(__isl_take isl_id *id)
{
struct isl_hash_table_entry *entry;
if (!id)
return NULL;
if (id->ref < 0)
return NULL;
if (--id->ref > 0)
return NULL;
entry = isl_hash_table_find(id->ctx, &id->ctx->id_table, id->hash,
isl_id_eq, id, 0);
if (!entry)
isl_die(id->ctx, isl_error_unknown,
"unable to find id", (void)0);
else
isl_hash_table_remove(id->ctx, &id->ctx->id_table, entry);
if (id->free_user)
id->free_user(id->user);
free((char *)id->name);
isl_ctx_deref(id->ctx);
free(id);
return NULL;
}
/* Return the result of applying the comparison operator "type"
* to "pa1" and "pa2".
*
* In particular, construct an isl_pw_aff that is equal to 1
* on the subset of the shared domain of "pa1" and "pa2" where
* the comparison holds and 0 on the other part of the shared domain.
*
* If "pa1" or "pa2" involve any NaN, then return NaN.
*/
__isl_give isl_pw_aff *pet_comparison(enum pet_op_type type,
__isl_take isl_pw_aff *pa1, __isl_take isl_pw_aff *pa2)
{
isl_set *dom;
isl_set *cond;
isl_pw_aff *res;
if (!pa1 || !pa2)
goto error;
if (isl_pw_aff_involves_nan(pa1) || isl_pw_aff_involves_nan(pa2)) {
isl_space *space = isl_pw_aff_get_domain_space(pa1);
isl_local_space *ls = isl_local_space_from_space(space);
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
return isl_pw_aff_nan_on_domain(ls);
}
dom = isl_pw_aff_domain(isl_pw_aff_copy(pa1));
dom = isl_set_intersect(dom, isl_pw_aff_domain(isl_pw_aff_copy(pa2)));
switch (type) {
case pet_op_lt:
cond = isl_pw_aff_lt_set(pa1, pa2);
break;
case pet_op_le:
cond = isl_pw_aff_le_set(pa1, pa2);
break;
case pet_op_gt:
cond = isl_pw_aff_gt_set(pa1, pa2);
break;
case pet_op_ge:
cond = isl_pw_aff_ge_set(pa1, pa2);
break;
case pet_op_eq:
cond = isl_pw_aff_eq_set(pa1, pa2);
break;
case pet_op_ne:
cond = isl_pw_aff_ne_set(pa1, pa2);
break;
default:
isl_die(isl_pw_aff_get_ctx(pa1), isl_error_internal,
"not a comparison operator", cond = NULL);
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
}
cond = isl_set_coalesce(cond);
res = indicator_function(cond, dom);
return res;
error:
isl_pw_aff_free(pa1);
isl_pw_aff_free(pa2);
return NULL;
}
