#define xS(TYPE,NAME) struct TYPE ## _ ## NAME
#define S(TYPE,NAME) xS(TYPE,NAME)
-static __isl_give PW *FN(PW,alloc_)(__isl_take isl_dim *dim, int n)
+#ifdef HAS_TYPE
+__isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim,
+ enum isl_fold type, int n)
+#else
+__isl_give PW *FN(PW,alloc_size)(__isl_take isl_space *dim, int n)
+#endif
{
+ isl_ctx *ctx;
struct PW *pw;
if (!dim)
return NULL;
- isl_assert(dim->ctx, n >= 0, goto error);
- pw = isl_alloc(dim->ctx, struct PW,
+ ctx = isl_space_get_ctx(dim);
+ isl_assert(ctx, n >= 0, goto error);
+ pw = isl_alloc(ctx, struct PW,
sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
if (!pw)
goto error;
pw->ref = 1;
+#ifdef HAS_TYPE
+ pw->type = type;
+#endif
pw->size = n;
pw->n = 0;
pw->dim = dim;
return pw;
error:
- isl_dim_free(dim);
+ isl_space_free(dim);
return NULL;
}
-__isl_give PW *FN(PW,zero)(__isl_take isl_dim *dim)
+#ifdef HAS_TYPE
+__isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim, enum isl_fold type)
{
- return FN(PW,alloc_)(dim, 0);
+ return FN(PW,alloc_size)(dim, type, 0);
}
+#else
+__isl_give PW *FN(PW,ZERO)(__isl_take isl_space *dim)
+{
+ return FN(PW,alloc_size)(dim, 0);
+}
+#endif
__isl_give PW *FN(PW,add_piece)(__isl_take PW *pw,
__isl_take isl_set *set, __isl_take EL *el)
{
+ isl_ctx *ctx;
+ isl_space *el_dim = NULL;
+
if (!pw || !set || !el)
goto error;
- if (isl_set_fast_is_empty(set) || FN(EL,IS_ZERO)(el)) {
+ if (isl_set_plain_is_empty(set) || FN(EL,EL_IS_ZERO)(el)) {
isl_set_free(set);
FN(EL,free)(el);
return pw;
}
- isl_assert(set->ctx, isl_dim_equal(pw->dim, el->dim), goto error);
- isl_assert(set->ctx, pw->n < pw->size, goto error);
+ ctx = isl_set_get_ctx(set);
+#ifdef HAS_TYPE
+ if (pw->type != el->type)
+ isl_die(ctx, isl_error_invalid, "fold types don't match",
+ goto error);
+#endif
+ el_dim = FN(EL,get_space(el));
+ isl_assert(ctx, isl_space_is_equal(pw->dim, el_dim), goto error);
+ isl_assert(ctx, pw->n < pw->size, goto error);
pw->p[pw->n].set = set;
pw->p[pw->n].FIELD = el;
pw->n++;
+ isl_space_free(el_dim);
return pw;
error:
+ isl_space_free(el_dim);
FN(PW,free)(pw);
isl_set_free(set);
FN(EL,free)(el);
return NULL;
}
+#ifdef HAS_TYPE
+__isl_give PW *FN(PW,alloc)(enum isl_fold type,
+ __isl_take isl_set *set, __isl_take EL *el)
+#else
__isl_give PW *FN(PW,alloc)(__isl_take isl_set *set, __isl_take EL *el)
+#endif
{
PW *pw;
if (!set || !el)
goto error;
- pw = FN(PW,alloc_)(isl_set_get_dim(set), 1);
+#ifdef HAS_TYPE
+ pw = FN(PW,alloc_size)(FN(EL,get_space)(el), type, 1);
+#else
+ pw = FN(PW,alloc_size)(FN(EL,get_space)(el), 1);
+#endif
return FN(PW,add_piece)(pw, set, el);
error:
if (!pw)
return NULL;
- dup = FN(PW,alloc_)(isl_dim_copy(pw->dim), pw->n);
+#ifdef HAS_TYPE
+ dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, pw->n);
+#else
+ dup = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->n);
+#endif
if (!dup)
return NULL;
FN(EL,copy)(pw->p[i].FIELD));
return dup;
-error:
- FN(PW,free)(dup);
- return NULL;
}
__isl_give PW *FN(PW,cow)(__isl_take PW *pw)
return pw;
}
-void FN(PW,free)(__isl_take PW *pw)
+void *FN(PW,free)(__isl_take PW *pw)
{
int i;
if (!pw)
- return;
+ return NULL;
if (--pw->ref > 0)
- return;
+ return NULL;
for (i = 0; i < pw->n; ++i) {
isl_set_free(pw->p[i].set);
FN(EL,free)(pw->p[i].FIELD);
}
- isl_dim_free(pw->dim);
+ isl_space_free(pw->dim);
free(pw);
+
+ return NULL;
+}
+
+const char *FN(PW,get_dim_name)(__isl_keep PW *pw, enum isl_dim_type type,
+ unsigned pos)
+{
+ return pw ? isl_space_get_dim_name(pw->dim, type, pos) : NULL;
+}
+
+int FN(PW,has_dim_id)(__isl_keep PW *pw, enum isl_dim_type type, unsigned pos)
+{
+ return pw ? isl_space_has_dim_id(pw->dim, type, pos) : -1;
}
-int FN(PW,is_zero)(__isl_keep PW *pw)
+__isl_give isl_id *FN(PW,get_dim_id)(__isl_keep PW *pw, enum isl_dim_type type,
+ unsigned pos)
+{
+ return pw ? isl_space_get_dim_id(pw->dim, type, pos) : NULL;
+}
+
+const char *FN(PW,get_tuple_name)(__isl_keep PW *pw, enum isl_dim_type type)
+{
+ return pw ? isl_space_get_tuple_name(pw->dim, type) : NULL;
+}
+
+int FN(PW,has_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
+{
+ return pw ? isl_space_has_tuple_id(pw->dim, type) : -1;
+}
+
+__isl_give isl_id *FN(PW,get_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type)
+{
+ return pw ? isl_space_get_tuple_id(pw->dim, type) : NULL;
+}
+
+int FN(PW,IS_ZERO)(__isl_keep PW *pw)
{
if (!pw)
return -1;
return pw->n == 0;
}
-__isl_give PW *FN(PW,add)(__isl_take PW *pw1, __isl_take PW *pw2)
+#ifndef NO_REALIGN
+__isl_give PW *FN(PW,realign_domain)(__isl_take PW *pw,
+ __isl_take isl_reordering *exp)
+{
+ int i;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw || !exp)
+ return NULL;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_realign(pw->p[i].set,
+ isl_reordering_copy(exp));
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = FN(EL,realign_domain)(pw->p[i].FIELD,
+ isl_reordering_copy(exp));
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ pw = FN(PW,reset_domain_space)(pw, isl_space_copy(exp->dim));
+
+ isl_reordering_free(exp);
+ return pw;
+error:
+ isl_reordering_free(exp);
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+/* Align the parameters of "pw" to those of "model".
+ */
+__isl_give PW *FN(PW,align_params)(__isl_take PW *pw, __isl_take isl_space *model)
+{
+ isl_ctx *ctx;
+
+ if (!pw || !model)
+ goto error;
+
+ ctx = isl_space_get_ctx(model);
+ if (!isl_space_has_named_params(model))
+ isl_die(ctx, isl_error_invalid,
+ "model has unnamed parameters", goto error);
+ if (!isl_space_has_named_params(pw->dim))
+ isl_die(ctx, isl_error_invalid,
+ "input has unnamed parameters", goto error);
+ if (!isl_space_match(pw->dim, isl_dim_param, model, isl_dim_param)) {
+ isl_reordering *exp;
+
+ model = isl_space_drop_dims(model, isl_dim_in,
+ 0, isl_space_dim(model, isl_dim_in));
+ model = isl_space_drop_dims(model, isl_dim_out,
+ 0, isl_space_dim(model, isl_dim_out));
+ exp = isl_parameter_alignment_reordering(pw->dim, model);
+ exp = isl_reordering_extend_space(exp,
+ FN(PW,get_domain_space)(pw));
+ pw = FN(PW,realign_domain)(pw, exp);
+ }
+
+ isl_space_free(model);
+ return pw;
+error:
+ isl_space_free(model);
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+static __isl_give PW *FN(PW,align_params_pw_pw_and)(__isl_take PW *pw1,
+ __isl_take PW *pw2,
+ __isl_give PW *(*fn)(__isl_take PW *pw1, __isl_take PW *pw2))
+{
+ isl_ctx *ctx;
+
+ if (!pw1 || !pw2)
+ goto error;
+ if (isl_space_match(pw1->dim, isl_dim_param, pw2->dim, isl_dim_param))
+ return fn(pw1, pw2);
+ ctx = FN(PW,get_ctx)(pw1);
+ if (!isl_space_has_named_params(pw1->dim) ||
+ !isl_space_has_named_params(pw2->dim))
+ isl_die(ctx, isl_error_invalid,
+ "unaligned unnamed parameters", goto error);
+ pw1 = FN(PW,align_params)(pw1, FN(PW,get_space)(pw2));
+ pw2 = FN(PW,align_params)(pw2, FN(PW,get_space)(pw1));
+ return fn(pw1, pw2);
+error:
+ FN(PW,free)(pw1);
+ FN(PW,free)(pw2);
+ return NULL;
+}
+
+static __isl_give PW *FN(PW,align_params_pw_set_and)(__isl_take PW *pw,
+ __isl_take isl_set *set,
+ __isl_give PW *(*fn)(__isl_take PW *pw, __isl_take isl_set *set))
+{
+ isl_ctx *ctx;
+
+ if (!pw || !set)
+ goto error;
+ if (isl_space_match(pw->dim, isl_dim_param, set->dim, isl_dim_param))
+ return fn(pw, set);
+ ctx = FN(PW,get_ctx)(pw);
+ if (!isl_space_has_named_params(pw->dim) ||
+ !isl_space_has_named_params(set->dim))
+ isl_die(ctx, isl_error_invalid,
+ "unaligned unnamed parameters", goto error);
+ pw = FN(PW,align_params)(pw, isl_set_get_space(set));
+ set = isl_set_align_params(set, FN(PW,get_space)(pw));
+ return fn(pw, set);
+error:
+ FN(PW,free)(pw);
+ isl_set_free(set);
+ return NULL;
+}
+#endif
+
+static __isl_give PW *FN(PW,union_add_aligned)(__isl_take PW *pw1,
+ __isl_take PW *pw2)
{
int i, j, n;
struct PW *res;
+ isl_ctx *ctx;
isl_set *set;
if (!pw1 || !pw2)
goto error;
- isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
+ ctx = isl_space_get_ctx(pw1->dim);
+#ifdef HAS_TYPE
+ if (pw1->type != pw2->type)
+ isl_die(ctx, isl_error_invalid,
+ "fold types don't match", goto error);
+#endif
+ isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
- if (FN(PW,is_zero)(pw1)) {
+ if (FN(PW,IS_ZERO)(pw1)) {
FN(PW,free)(pw1);
return pw2;
}
- if (FN(PW,is_zero)(pw2)) {
+ if (FN(PW,IS_ZERO)(pw2)) {
FN(PW,free)(pw2);
return pw1;
}
n = (pw1->n + 1) * (pw2->n + 1);
- res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), n);
+#ifdef HAS_TYPE
+ res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
+#else
+ res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
+#endif
for (i = 0; i < pw1->n; ++i) {
set = isl_set_copy(pw1->p[i].set);
for (j = 0; j < pw2->n; ++j) {
struct isl_set *common;
EL *sum;
- set = isl_set_subtract(set,
- isl_set_copy(pw2->p[j].set));
common = isl_set_intersect(isl_set_copy(pw1->p[i].set),
isl_set_copy(pw2->p[j].set));
- if (isl_set_fast_is_empty(common)) {
+ if (isl_set_plain_is_empty(common)) {
isl_set_free(common);
continue;
}
+ set = isl_set_subtract(set,
+ isl_set_copy(pw2->p[j].set));
- sum = ADD(common, FN(EL,copy)(pw1->p[i].FIELD),
- FN(EL,copy)(pw2->p[j].FIELD));
+ sum = FN(EL,add_on_domain)(common,
+ FN(EL,copy)(pw1->p[i].FIELD),
+ FN(EL,copy)(pw2->p[j].FIELD));
res = FN(PW,add_piece)(res, common, sum);
}
return NULL;
}
-__isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
+/* Private version of "union_add". For isl_pw_qpolynomial and
+ * isl_pw_qpolynomial_fold, we prefer to simply call it "add".
+ */
+static __isl_give PW *FN(PW,union_add_)(__isl_take PW *pw1, __isl_take PW *pw2)
+{
+ return FN(PW,align_params_pw_pw_and)(pw1, pw2,
+ &FN(PW,union_add_aligned));
+}
+
+/* Make sure "pw" has room for at least "n" more pieces.
+ *
+ * If there is only one reference to pw, we extend it in place.
+ * Otherwise, we create a new PW and copy the pieces.
+ */
+static __isl_give PW *FN(PW,grow)(__isl_take PW *pw, int n)
{
int i;
+ isl_ctx *ctx;
PW *res;
+ if (!pw)
+ return NULL;
+ if (pw->n + n <= pw->size)
+ return pw;
+ ctx = FN(PW,get_ctx)(pw);
+ n += pw->n;
+ if (pw->ref == 1) {
+ res = isl_realloc(ctx, pw, struct PW,
+ sizeof(struct PW) + (n - 1) * sizeof(S(PW,piece)));
+ if (!res)
+ return FN(PW,free)(pw);
+ res->size = n;
+ return res;
+ }
+#ifdef HAS_TYPE
+ res = FN(PW,alloc_size)(isl_space_copy(pw->dim), pw->type, n);
+#else
+ res = FN(PW,alloc_size)(isl_space_copy(pw->dim), n);
+#endif
+ if (!res)
+ return FN(PW,free)(pw);
+ for (i = 0; i < pw->n; ++i)
+ res = FN(PW,add_piece)(res, isl_set_copy(pw->p[i].set),
+ FN(EL,copy)(pw->p[i].FIELD));
+ FN(PW,free)(pw);
+ return res;
+}
+
+static __isl_give PW *FN(PW,add_disjoint_aligned)(__isl_take PW *pw1,
+ __isl_take PW *pw2)
+{
+ int i;
+ isl_ctx *ctx;
+
if (!pw1 || !pw2)
goto error;
- isl_assert(pw1->dim->ctx, isl_dim_equal(pw1->dim, pw2->dim), goto error);
+ if (pw1->size < pw1->n + pw2->n && pw1->n < pw2->n)
+ return FN(PW,add_disjoint_aligned)(pw2, pw1);
+
+ ctx = isl_space_get_ctx(pw1->dim);
+#ifdef HAS_TYPE
+ if (pw1->type != pw2->type)
+ isl_die(ctx, isl_error_invalid,
+ "fold types don't match", goto error);
+#endif
+ isl_assert(ctx, isl_space_is_equal(pw1->dim, pw2->dim), goto error);
- if (FN(PW,is_zero)(pw1)) {
+ if (FN(PW,IS_ZERO)(pw1)) {
FN(PW,free)(pw1);
return pw2;
}
- if (FN(PW,is_zero)(pw2)) {
+ if (FN(PW,IS_ZERO)(pw2)) {
FN(PW,free)(pw2);
return pw1;
}
- res = FN(PW,alloc_)(isl_dim_copy(pw1->dim), pw1->n + pw2->n);
-
- for (i = 0; i < pw1->n; ++i)
- res = FN(PW,add_piece)(res,
- isl_set_copy(pw1->p[i].set),
- FN(EL,copy)(pw1->p[i].FIELD));
+ pw1 = FN(PW,grow)(pw1, pw2->n);
+ if (!pw1)
+ goto error;
for (i = 0; i < pw2->n; ++i)
- res = FN(PW,add_piece)(res,
+ pw1 = FN(PW,add_piece)(pw1,
isl_set_copy(pw2->p[i].set),
FN(EL,copy)(pw2->p[i].FIELD));
+ FN(PW,free)(pw2);
+
+ return pw1;
+error:
FN(PW,free)(pw1);
FN(PW,free)(pw2);
+ return NULL;
+}
+
+__isl_give PW *FN(PW,add_disjoint)(__isl_take PW *pw1, __isl_take PW *pw2)
+{
+ return FN(PW,align_params_pw_pw_and)(pw1, pw2,
+ &FN(PW,add_disjoint_aligned));
+}
+
+/* This function is currently only used from isl_aff.c
+ */
+static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
+ __isl_take PW *pw2,
+ __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
+ __attribute__ ((unused));
+
+/* Apply "fn" to pairs of elements from pw1 and pw2 on shared domains.
+ */
+static __isl_give PW *FN(PW,on_shared_domain)(__isl_take PW *pw1,
+ __isl_take PW *pw2,
+ __isl_give EL *(*fn)(__isl_take EL *el1, __isl_take EL *el2))
+{
+ int i, j, n;
+ PW *res = NULL;
+
+ if (!pw1 || !pw2)
+ goto error;
+
+ n = pw1->n * pw2->n;
+#ifdef HAS_TYPE
+ res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), pw1->type, n);
+#else
+ res = FN(PW,alloc_size)(isl_space_copy(pw1->dim), n);
+#endif
+
+ for (i = 0; i < pw1->n; ++i) {
+ for (j = 0; j < pw2->n; ++j) {
+ isl_set *common;
+ EL *res_ij;
+ int empty;
+
+ common = isl_set_intersect(
+ isl_set_copy(pw1->p[i].set),
+ isl_set_copy(pw2->p[j].set));
+ empty = isl_set_plain_is_empty(common);
+ if (empty < 0 || empty) {
+ isl_set_free(common);
+ if (empty < 0)
+ goto error;
+ continue;
+ }
+ res_ij = fn(FN(EL,copy)(pw1->p[i].FIELD),
+ FN(EL,copy)(pw2->p[j].FIELD));
+ res_ij = FN(EL,gist)(res_ij, isl_set_copy(common));
+
+ res = FN(PW,add_piece)(res, common, res_ij);
+ }
+ }
+
+ FN(PW,free)(pw1);
+ FN(PW,free)(pw2);
return res;
error:
FN(PW,free)(pw1);
FN(PW,free)(pw2);
+ FN(PW,free)(res);
return NULL;
}
+#ifndef NO_NEG
+__isl_give PW *FN(PW,neg)(__isl_take PW *pw)
+{
+ int i;
+
+ if (!pw)
+ return NULL;
+
+ if (FN(PW,IS_ZERO)(pw))
+ return pw;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].FIELD = FN(EL,neg)(pw->p[i].FIELD);
+ if (!pw->p[i].FIELD)
+ return FN(PW,free)(pw);
+ }
+
+ return pw;
+}
+
+__isl_give PW *FN(PW,sub)(__isl_take PW *pw1, __isl_take PW *pw2)
+{
+ return FN(PW,add)(pw1, FN(PW,neg)(pw2));
+}
+#endif
+
+#ifndef NO_EVAL
__isl_give isl_qpolynomial *FN(PW,eval)(__isl_take PW *pw,
__isl_take isl_point *pnt)
{
int i;
- int found;
+ int found = 0;
+ isl_ctx *ctx;
+ isl_space *pnt_dim = NULL;
isl_qpolynomial *qp;
if (!pw || !pnt)
goto error;
- isl_assert(pnt->dim->ctx, isl_dim_equal(pnt->dim, pw->dim), goto error);
+ ctx = isl_point_get_ctx(pnt);
+ pnt_dim = isl_point_get_space(pnt);
+ isl_assert(ctx, isl_space_is_domain(pnt_dim, pw->dim), goto error);
for (i = 0; i < pw->n; ++i) {
found = isl_set_contains_point(pw->p[i].set, pnt);
qp = FN(EL,eval)(FN(EL,copy)(pw->p[i].FIELD),
isl_point_copy(pnt));
else
- qp = isl_qpolynomial_zero(isl_dim_copy(pw->dim));
+ qp = isl_qpolynomial_zero_on_domain(FN(PW,get_domain_space)(pw));
FN(PW,free)(pw);
+ isl_space_free(pnt_dim);
isl_point_free(pnt);
return qp;
error:
FN(PW,free)(pw);
+ isl_space_free(pnt_dim);
isl_point_free(pnt);
return NULL;
}
+#endif
__isl_give isl_set *FN(PW,domain)(__isl_take PW *pw)
{
if (!pw)
return NULL;
- dom = isl_set_empty(isl_dim_copy(pw->dim));
+ dom = isl_set_empty(FN(PW,get_domain_space)(pw));
for (i = 0; i < pw->n; ++i)
dom = isl_set_union_disjoint(dom, isl_set_copy(pw->p[i].set));
return dom;
}
-__isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw, __isl_take isl_set *set)
+/* Restrict the domain of "pw" by combining each cell
+ * with "set" through a call to "fn", where "fn" may be
+ * isl_set_intersect or isl_set_intersect_params.
+ */
+static __isl_give PW *FN(PW,intersect_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *set,
+ __isl_give isl_set *(*fn)(__isl_take isl_set *set1,
+ __isl_take isl_set *set2))
{
int i;
if (!pw)
goto error;
- for (i = 0; i < pw->n; ++i) {
- pw->p[i].set = isl_set_intersect(pw->p[i].set, isl_set_copy(set));
+ for (i = pw->n - 1; i >= 0; --i) {
+ isl_basic_set *aff;
+ pw->p[i].set = fn(pw->p[i].set, isl_set_copy(set));
if (!pw->p[i].set)
goto error;
+ aff = isl_set_affine_hull(isl_set_copy(pw->p[i].set));
+ pw->p[i].FIELD = FN(EL,substitute_equalities)(pw->p[i].FIELD,
+ aff);
+ if (!pw->p[i].FIELD)
+ goto error;
+ if (isl_set_plain_is_empty(pw->p[i].set)) {
+ isl_set_free(pw->p[i].set);
+ FN(EL,free)(pw->p[i].FIELD);
+ if (i != pw->n - 1)
+ pw->p[i] = pw->p[pw->n - 1];
+ pw->n--;
+ }
}
isl_set_free(set);
return NULL;
}
-__isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
+static __isl_give PW *FN(PW,intersect_domain_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *set)
+{
+ return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect);
+}
+
+__isl_give PW *FN(PW,intersect_domain)(__isl_take PW *pw,
+ __isl_take isl_set *context)
+{
+ return FN(PW,align_params_pw_set_and)(pw, context,
+ &FN(PW,intersect_domain_aligned));
+}
+
+static __isl_give PW *FN(PW,intersect_params_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *set)
+{
+ return FN(PW,intersect_aligned)(pw, set, &isl_set_intersect_params);
+}
+
+/* Intersect the domain of "pw" with the parameter domain "context".
+ */
+__isl_give PW *FN(PW,intersect_params)(__isl_take PW *pw,
+ __isl_take isl_set *context)
+{
+ return FN(PW,align_params_pw_set_and)(pw, context,
+ &FN(PW,intersect_params_aligned));
+}
+
+static __isl_give PW *FN(PW,gist_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *context,
+ __isl_give EL *(*fn_el)(__isl_take EL *el,
+ __isl_take isl_set *set),
+ __isl_give isl_set *(*fn_dom)(__isl_take isl_set *set,
+ __isl_take isl_basic_set *bset))
{
int i;
isl_basic_set *hull = NULL;
return pw;
}
- hull = isl_set_convex_hull(isl_set_copy(context));
+ if (!isl_space_match(pw->dim, isl_dim_param,
+ context->dim, isl_dim_param)) {
+ pw = FN(PW,align_params)(pw, isl_set_get_space(context));
+ context = isl_set_align_params(context, FN(PW,get_space)(pw));
+ }
+
+ context = isl_set_compute_divs(context);
+ hull = isl_set_simple_hull(isl_set_copy(context));
pw = FN(PW,cow)(pw);
if (!pw)
goto error;
- for (i = 0; i < pw->n; ++i) {
- pw->p[i].set = isl_set_gist(pw->p[i].set,
- isl_basic_set_copy(hull));
+ for (i = pw->n - 1; i >= 0; --i) {
+ pw->p[i].set = isl_set_intersect(pw->p[i].set,
+ isl_set_copy(context));
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = fn_el(pw->p[i].FIELD,
+ isl_set_copy(pw->p[i].set));
+ pw->p[i].set = fn_dom(pw->p[i].set, isl_basic_set_copy(hull));
if (!pw->p[i].set)
goto error;
+ if (isl_set_plain_is_empty(pw->p[i].set)) {
+ isl_set_free(pw->p[i].set);
+ FN(EL,free)(pw->p[i].FIELD);
+ if (i != pw->n - 1)
+ pw->p[i] = pw->p[pw->n - 1];
+ pw->n--;
+ }
}
isl_basic_set_free(hull);
return NULL;
}
+static __isl_give PW *FN(PW,gist_domain_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *set)
+{
+ return FN(PW,gist_aligned)(pw, set, &FN(EL,gist),
+ &isl_set_gist_basic_set);
+}
+
+__isl_give PW *FN(PW,gist)(__isl_take PW *pw, __isl_take isl_set *context)
+{
+ return FN(PW,align_params_pw_set_and)(pw, context,
+ &FN(PW,gist_domain_aligned));
+}
+
+static __isl_give PW *FN(PW,gist_params_aligned)(__isl_take PW *pw,
+ __isl_take isl_set *set)
+{
+ return FN(PW,gist_aligned)(pw, set, &FN(EL,gist_params),
+ &isl_set_gist_params_basic_set);
+}
+
+__isl_give PW *FN(PW,gist_params)(__isl_take PW *pw,
+ __isl_take isl_set *context)
+{
+ return FN(PW,align_params_pw_set_and)(pw, context,
+ &FN(PW,gist_params_aligned));
+}
+
__isl_give PW *FN(PW,coalesce)(__isl_take PW *pw)
{
int i, j;
for (i = pw->n - 1; i >= 0; --i) {
for (j = i - 1; j >= 0; --j) {
- if (!FN(EL,is_equal)(pw->p[i].FIELD, pw->p[j].FIELD))
+ if (!FN(EL,plain_is_equal)(pw->p[i].FIELD,
+ pw->p[j].FIELD))
continue;
pw->p[j].set = isl_set_union(pw->p[j].set,
pw->p[i].set);
isl_ctx *FN(PW,get_ctx)(__isl_keep PW *pw)
{
- return pw ? pw->dim->ctx : NULL;
+ return pw ? isl_space_get_ctx(pw->dim) : NULL;
}
+#ifndef NO_INVOLVES_DIMS
int FN(PW,involves_dims)(__isl_keep PW *pw, enum isl_dim_type type,
unsigned first, unsigned n)
{
int i;
+ enum isl_dim_type set_type;
if (!pw)
return -1;
if (pw->n == 0 || n == 0)
return 0;
+
+ set_type = type == isl_dim_in ? isl_dim_set : type;
+
for (i = 0; i < pw->n; ++i) {
int involves = FN(EL,involves_dims)(pw->p[i].FIELD,
type, first, n);
if (involves < 0 || involves)
return involves;
+ involves = isl_set_involves_dims(pw->p[i].set,
+ set_type, first, n);
+ if (involves < 0 || involves)
+ return involves;
}
return 0;
}
+#endif
+
+__isl_give PW *FN(PW,set_dim_name)(__isl_take PW *pw,
+ enum isl_dim_type type, unsigned pos, const char *s)
+{
+ int i;
+ enum isl_dim_type set_type;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+
+ set_type = type == isl_dim_in ? isl_dim_set : type;
+
+ pw->dim = isl_space_set_dim_name(pw->dim, type, pos, s);
+ if (!pw->dim)
+ goto error;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_set_dim_name(pw->p[i].set,
+ set_type, pos, s);
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = FN(EL,set_dim_name)(pw->p[i].FIELD, type, pos, s);
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+#ifndef NO_DROP_DIMS
__isl_give PW *FN(PW,drop_dims)(__isl_take PW *pw,
enum isl_dim_type type, unsigned first, unsigned n)
{
int i;
+ enum isl_dim_type set_type;
if (!pw)
return NULL;
- if (n == 0)
+ if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
return pw;
+ set_type = type == isl_dim_in ? isl_dim_set : type;
+
pw = FN(PW,cow)(pw);
if (!pw)
return NULL;
- pw->dim = isl_dim_drop(pw->dim, type, first, n);
+ pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
if (!pw->dim)
goto error;
for (i = 0; i < pw->n; ++i) {
- pw->p[i].set = isl_set_drop(pw->p[i].set, type, first, n);
+ pw->p[i].set = isl_set_drop(pw->p[i].set, set_type, first, n);
if (!pw->p[i].set)
goto error;
pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
return NULL;
}
-__isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
- enum isl_dim_type type, unsigned pos, isl_int v)
+/* This function is very similar to drop_dims.
+ * The only difference is that the cells may still involve
+ * the specified dimensions. They are removed using
+ * isl_set_project_out instead of isl_set_drop.
+ */
+__isl_give PW *FN(PW,project_out)(__isl_take PW *pw,
+ enum isl_dim_type type, unsigned first, unsigned n)
{
int i;
+ enum isl_dim_type set_type;
if (!pw)
return NULL;
+ if (n == 0 && !isl_space_get_tuple_name(pw->dim, type))
+ return pw;
+
+ set_type = type == isl_dim_in ? isl_dim_set : type;
pw = FN(PW,cow)(pw);
if (!pw)
return NULL;
+ pw->dim = isl_space_drop_dims(pw->dim, type, first, n);
+ if (!pw->dim)
+ goto error;
for (i = 0; i < pw->n; ++i) {
- pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
+ pw->p[i].set = isl_set_project_out(pw->p[i].set,
+ set_type, first, n);
if (!pw->p[i].set)
goto error;
+ pw->p[i].FIELD = FN(EL,drop_dims)(pw->p[i].FIELD, type, first, n);
+ if (!pw->p[i].FIELD)
+ goto error;
}
return pw;
return NULL;
}
-unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
+/* Project the domain of pw onto its parameter space.
+ */
+__isl_give PW *FN(PW,project_domain_on_params)(__isl_take PW *pw)
+{
+ isl_space *space;
+ unsigned n;
+
+ n = FN(PW,dim)(pw, isl_dim_in);
+ pw = FN(PW,project_out)(pw, isl_dim_in, 0, n);
+ space = FN(PW,get_domain_space)(pw);
+ space = isl_space_params(space);
+ pw = FN(PW,reset_domain_space)(pw, space);
+ return pw;
+}
+#endif
+
+#ifndef NO_INSERT_DIMS
+__isl_give PW *FN(PW,insert_dims)(__isl_take PW *pw, enum isl_dim_type type,
+ unsigned first, unsigned n)
{
- return pw ? isl_dim_size(pw->dim, type) : 0;
+ int i;
+ enum isl_dim_type set_type;
+
+ if (!pw)
+ return NULL;
+ if (n == 0 && !isl_space_is_named_or_nested(pw->dim, type))
+ return pw;
+
+ set_type = type == isl_dim_in ? isl_dim_set : type;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+
+ pw->dim = isl_space_insert_dims(pw->dim, type, first, n);
+ if (!pw->dim)
+ goto error;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_insert_dims(pw->p[i].set,
+ set_type, first, n);
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = FN(EL,insert_dims)(pw->p[i].FIELD,
+ type, first, n);
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+#endif
+
+__isl_give PW *FN(PW,fix_dim)(__isl_take PW *pw,
+ enum isl_dim_type type, unsigned pos, isl_int v)
+{
+ int i;
+
+ if (!pw)
+ return NULL;
+
+ if (type == isl_dim_in)
+ type = isl_dim_set;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_fix(pw->p[i].set, type, pos, v);
+ if (!pw->p[i].set)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+unsigned FN(PW,dim)(__isl_keep PW *pw, enum isl_dim_type type)
+{
+ return pw ? isl_space_dim(pw->dim, type) : 0;
+}
+
+__isl_give PW *FN(PW,split_dims)(__isl_take PW *pw,
+ enum isl_dim_type type, unsigned first, unsigned n)
+{
+ int i;
+
+ if (!pw)
+ return NULL;
+ if (n == 0)
+ return pw;
+
+ if (type == isl_dim_in)
+ type = isl_dim_set;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+ if (!pw->dim)
+ goto error;
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_split_dims(pw->p[i].set, type, first, n);
+ if (!pw->p[i].set)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+#ifndef NO_OPT
+/* Compute the maximal value attained by the piecewise quasipolynomial
+ * on its domain or zero if the domain is empty.
+ * In the worst case, the domain is scanned completely,
+ * so the domain is assumed to be bounded.
+ */
+__isl_give isl_qpolynomial *FN(PW,opt)(__isl_take PW *pw, int max)
+{
+ int i;
+ isl_qpolynomial *opt;
+
+ if (!pw)
+ return NULL;
+
+ if (pw->n == 0) {
+ isl_space *dim = isl_space_copy(pw->dim);
+ FN(PW,free)(pw);
+ return isl_qpolynomial_zero_on_domain(isl_space_domain(dim));
+ }
+
+ opt = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[0].FIELD),
+ isl_set_copy(pw->p[0].set), max);
+ for (i = 1; i < pw->n; ++i) {
+ isl_qpolynomial *opt_i;
+ opt_i = FN(EL,opt_on_domain)(FN(EL,copy)(pw->p[i].FIELD),
+ isl_set_copy(pw->p[i].set), max);
+ if (max)
+ opt = isl_qpolynomial_max_cst(opt, opt_i);
+ else
+ opt = isl_qpolynomial_min_cst(opt, opt_i);
+ }
+
+ FN(PW,free)(pw);
+ return opt;
+}
+
+__isl_give isl_qpolynomial *FN(PW,max)(__isl_take PW *pw)
+{
+ return FN(PW,opt)(pw, 1);
+}
+
+__isl_give isl_qpolynomial *FN(PW,min)(__isl_take PW *pw)
+{
+ return FN(PW,opt)(pw, 0);
+}
+#endif
+
+__isl_give isl_space *FN(PW,get_space)(__isl_keep PW *pw)
+{
+ return pw ? isl_space_copy(pw->dim) : NULL;
+}
+
+__isl_give isl_space *FN(PW,get_domain_space)(__isl_keep PW *pw)
+{
+ return pw ? isl_space_domain(isl_space_copy(pw->dim)) : NULL;
+}
+
+#ifndef NO_RESET_DIM
+/* Reset the space of "pw". Since we don't know if the elements
+ * represent the spaces themselves or their domains, we pass along
+ * both when we call their reset_space_and_domain.
+ */
+static __isl_give PW *FN(PW,reset_space_and_domain)(__isl_take PW *pw,
+ __isl_take isl_space *space, __isl_take isl_space *domain)
+{
+ int i;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw || !space || !domain)
+ goto error;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_reset_space(pw->p[i].set,
+ isl_space_copy(domain));
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = FN(EL,reset_space_and_domain)(pw->p[i].FIELD,
+ isl_space_copy(space), isl_space_copy(domain));
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ isl_space_free(domain);
+
+ isl_space_free(pw->dim);
+ pw->dim = space;
+
+ return pw;
+error:
+ isl_space_free(domain);
+ isl_space_free(space);
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+__isl_give PW *FN(PW,reset_domain_space)(__isl_take PW *pw,
+ __isl_take isl_space *domain)
+{
+ isl_space *space;
+
+ space = isl_space_extend_domain_with_range(isl_space_copy(domain),
+ FN(PW,get_space)(pw));
+ return FN(PW,reset_space_and_domain)(pw, space, domain);
+}
+
+__isl_give PW *FN(PW,reset_space)(__isl_take PW *pw, __isl_take isl_space *dim)
+{
+ isl_space *domain;
+
+ domain = isl_space_domain(isl_space_copy(dim));
+ return FN(PW,reset_space_and_domain)(pw, dim, domain);
+}
+
+__isl_give PW *FN(PW,set_tuple_id)(__isl_keep PW *pw, enum isl_dim_type type,
+ __isl_take isl_id *id)
+{
+ isl_space *space;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return isl_id_free(id);
+
+ space = FN(PW,get_space)(pw);
+ space = isl_space_set_tuple_id(space, type, id);
+
+ return FN(PW,reset_space)(pw, space);
+}
+
+__isl_give PW *FN(PW,set_dim_id)(__isl_take PW *pw,
+ enum isl_dim_type type, unsigned pos, __isl_take isl_id *id)
+{
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return isl_id_free(id);
+ pw->dim = isl_space_set_dim_id(pw->dim, type, pos, id);
+ return FN(PW,reset_space)(pw, isl_space_copy(pw->dim));
+}
+#endif
+
+int FN(PW,has_equal_space)(__isl_keep PW *pw1, __isl_keep PW *pw2)
+{
+ if (!pw1 || !pw2)
+ return -1;
+
+ return isl_space_is_equal(pw1->dim, pw2->dim);
+}
+
+#ifndef NO_MORPH
+__isl_give PW *FN(PW,morph_domain)(__isl_take PW *pw,
+ __isl_take isl_morph *morph)
+{
+ int i;
+ isl_ctx *ctx;
+
+ if (!pw || !morph)
+ goto error;
+
+ ctx = isl_space_get_ctx(pw->dim);
+ isl_assert(ctx, isl_space_is_domain(morph->dom->dim, pw->dim),
+ goto error);
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ goto error;
+ pw->dim = isl_space_extend_domain_with_range(
+ isl_space_copy(morph->ran->dim), pw->dim);
+ if (!pw->dim)
+ goto error;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_morph_set(isl_morph_copy(morph), pw->p[i].set);
+ if (!pw->p[i].set)
+ goto error;
+ pw->p[i].FIELD = FN(EL,morph_domain)(pw->p[i].FIELD,
+ isl_morph_copy(morph));
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ isl_morph_free(morph);
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ isl_morph_free(morph);
+ return NULL;
+}
+#endif
+
+int FN(PW,n_piece)(__isl_keep PW *pw)
+{
+ return pw ? pw->n : 0;
+}
+
+int FN(PW,foreach_piece)(__isl_keep PW *pw,
+ int (*fn)(__isl_take isl_set *set, __isl_take EL *el, void *user),
+ void *user)
+{
+ int i;
+
+ if (!pw)
+ return -1;
+
+ for (i = 0; i < pw->n; ++i)
+ if (fn(isl_set_copy(pw->p[i].set),
+ FN(EL,copy)(pw->p[i].FIELD), user) < 0)
+ return -1;
+
+ return 0;
+}
+
+#ifndef NO_LIFT
+static int any_divs(__isl_keep isl_set *set)
+{
+ int i;
+
+ if (!set)
+ return -1;
+
+ for (i = 0; i < set->n; ++i)
+ if (set->p[i]->n_div > 0)
+ return 1;
+
+ return 0;
+}
+
+static int foreach_lifted_subset(__isl_take isl_set *set, __isl_take EL *el,
+ int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
+ void *user), void *user)
+{
+ int i;
+
+ if (!set || !el)
+ goto error;
+
+ for (i = 0; i < set->n; ++i) {
+ isl_set *lift;
+ EL *copy;
+
+ lift = isl_set_from_basic_set(isl_basic_set_copy(set->p[i]));
+ lift = isl_set_lift(lift);
+
+ copy = FN(EL,copy)(el);
+ copy = FN(EL,lift)(copy, isl_set_get_space(lift));
+
+ if (fn(lift, copy, user) < 0)
+ goto error;
+ }
+
+ isl_set_free(set);
+ FN(EL,free)(el);
+
+ return 0;
+error:
+ isl_set_free(set);
+ FN(EL,free)(el);
+ return -1;
+}
+
+int FN(PW,foreach_lifted_piece)(__isl_keep PW *pw,
+ int (*fn)(__isl_take isl_set *set, __isl_take EL *el,
+ void *user), void *user)
+{
+ int i;
+
+ if (!pw)
+ return -1;
+
+ for (i = 0; i < pw->n; ++i) {
+ isl_set *set;
+ EL *el;
+
+ set = isl_set_copy(pw->p[i].set);
+ el = FN(EL,copy)(pw->p[i].FIELD);
+ if (!any_divs(set)) {
+ if (fn(set, el, user) < 0)
+ return -1;
+ continue;
+ }
+ if (foreach_lifted_subset(set, el, fn, user) < 0)
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
+#ifndef NO_MOVE_DIMS
+__isl_give PW *FN(PW,move_dims)(__isl_take PW *pw,
+ enum isl_dim_type dst_type, unsigned dst_pos,
+ enum isl_dim_type src_type, unsigned src_pos, unsigned n)
+{
+ int i;
+
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+
+ pw->dim = isl_space_move_dims(pw->dim, dst_type, dst_pos, src_type, src_pos, n);
+ if (!pw->dim)
+ goto error;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].FIELD = FN(EL,move_dims)(pw->p[i].FIELD,
+ dst_type, dst_pos, src_type, src_pos, n);
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ if (dst_type == isl_dim_in)
+ dst_type = isl_dim_set;
+ if (src_type == isl_dim_in)
+ src_type = isl_dim_set;
+
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].set = isl_set_move_dims(pw->p[i].set,
+ dst_type, dst_pos,
+ src_type, src_pos, n);
+ if (!pw->p[i].set)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+#endif
+
+__isl_give PW *FN(PW,mul_isl_int)(__isl_take PW *pw, isl_int v)
+{
+ int i;
+
+ if (isl_int_is_one(v))
+ return pw;
+ if (pw && DEFAULT_IS_ZERO && isl_int_is_zero(v)) {
+ PW *zero;
+ isl_space *dim = FN(PW,get_space)(pw);
+#ifdef HAS_TYPE
+ zero = FN(PW,ZERO)(dim, pw->type);
+#else
+ zero = FN(PW,ZERO)(dim);
+#endif
+ FN(PW,free)(pw);
+ return zero;
+ }
+ pw = FN(PW,cow)(pw);
+ if (!pw)
+ return NULL;
+ if (pw->n == 0)
+ return pw;
+
+#ifdef HAS_TYPE
+ if (isl_int_is_neg(v))
+ pw->type = isl_fold_type_negate(pw->type);
+#endif
+ for (i = 0; i < pw->n; ++i) {
+ pw->p[i].FIELD = FN(EL,scale)(pw->p[i].FIELD, v);
+ if (!pw->p[i].FIELD)
+ goto error;
+ }
+
+ return pw;
+error:
+ FN(PW,free)(pw);
+ return NULL;
+}
+
+__isl_give PW *FN(PW,scale)(__isl_take PW *pw, isl_int v)
+{
+ return FN(PW,mul_isl_int)(pw, v);
+}
+
+static int FN(PW,qsort_set_cmp)(const void *p1, const void *p2)
+{
+ const isl_set *set1 = *(const isl_set **)p1;
+ const isl_set *set2 = *(const isl_set **)p2;
+
+ return isl_set_plain_cmp(set1, set2);
+}
+
+/* We normalize in place, but if anything goes wrong we need
+ * to return NULL, so we need to make sure we don't change the
+ * meaning of any possible other copies of map.
+ */
+__isl_give PW *FN(PW,normalize)(__isl_take PW *pw)
+{
+ int i, j;
+ isl_set *set;
+
+ if (!pw)
+ return NULL;
+ for (i = 0; i < pw->n; ++i) {
+ set = isl_set_normalize(isl_set_copy(pw->p[i].set));
+ if (!set)
+ return FN(PW,free)(pw);
+ isl_set_free(pw->p[i].set);
+ pw->p[i].set = set;
+ }
+ qsort(pw->p, pw->n, sizeof(pw->p[0]), &FN(PW,qsort_set_cmp));
+ for (i = pw->n - 1; i >= 1; --i) {
+ if (!isl_set_plain_is_equal(pw->p[i - 1].set, pw->p[i].set))
+ continue;
+ if (!FN(EL,plain_is_equal)(pw->p[i - 1].FIELD, pw->p[i].FIELD))
+ continue;
+ set = isl_set_union(isl_set_copy(pw->p[i - 1].set),
+ isl_set_copy(pw->p[i].set));
+ if (!set)
+ return FN(PW,free)(pw);
+ isl_set_free(pw->p[i].set);
+ FN(EL,free)(pw->p[i].FIELD);
+ isl_set_free(pw->p[i - 1].set);
+ pw->p[i - 1].set = set;
+ for (j = i + 1; j < pw->n; ++j)
+ pw->p[j - 1] = pw->p[j];
+ pw->n--;
+ }
+
+ return pw;
+}
+
+/* Is pw1 obviously equal to pw2?
+ * That is, do they have obviously identical cells and obviously identical
+ * elements on each cell?
+ */
+int FN(PW,plain_is_equal)(__isl_keep PW *pw1, __isl_keep PW *pw2)
+{
+ int i;
+ int equal;
+
+ if (!pw1 || !pw2)
+ return -1;
+
+ if (pw1 == pw2)
+ return 1;
+ if (!isl_space_is_equal(pw1->dim, pw2->dim))
+ return 0;
+
+ pw1 = FN(PW,copy)(pw1);
+ pw2 = FN(PW,copy)(pw2);
+ pw1 = FN(PW,normalize)(pw1);
+ pw2 = FN(PW,normalize)(pw2);
+ if (!pw1 || !pw2)
+ goto error;
+
+ equal = pw1->n == pw2->n;
+ for (i = 0; equal && i < pw1->n; ++i) {
+ equal = isl_set_plain_is_equal(pw1->p[i].set, pw2->p[i].set);
+ if (equal < 0)
+ goto error;
+ if (!equal)
+ break;
+ equal = FN(EL,plain_is_equal)(pw1->p[i].FIELD, pw2->p[i].FIELD);
+ if (equal < 0)
+ goto error;
+ }
+
+ FN(PW,free)(pw1);
+ FN(PW,free)(pw2);
+ return equal;
+error:
+ FN(PW,free)(pw1);
+ FN(PW,free)(pw2);
+ return -1;
}