diff --git a/isl_reordering.h b/isl_reordering.h
--- a/isl_reordering.h
+++ b/isl_reordering.h
#include <isl/space.h>
-/* pos maps original dimensions to new dimensions.
+/* "pos" has "src_len" entries and maps original dimensions to new dimensions.
* The final space is given by "space".
* The number of dimensions (i.e., the range of values) in the result
* may be larger than the number of dimensions in the input.
- * In particular, the possible values of the entries in pos ranges from 0 to
- * the total dimension of dim - 1, unless isl_reordering_extend
- * has been called.
+ * In particular, the possible values of the entries in "pos" ranges from 0 to
+ * to "dst_len" - 1, where "dst_len" is equal to the total dimension of "space",
+ * unless isl_reordering_extend has been called.
*/
struct isl_reordering {
int ref;
isl_space *space;
- unsigned len;
+ unsigned src_len;
+ unsigned dst_len;
int pos[1];
};
typedef struct isl_reordering isl_reordering;