isl_union_map_is_subset: properly handle non-obviously empty subsets
commita4d79e58fa4077f88b5242631f016a554ddc9c31
authorSven Verdoolaege <skimo@kotnet.org>
Sat, 3 Mar 2012 22:52:06 +0000 (3 23:52 +0100)
committerSven Verdoolaege <skimo@kotnet.org>
Tue, 6 Mar 2012 13:27:03 +0000 (6 14:27 +0100)
tree5a41ca7d76c27e4a7ae396bbdc4e8d984dda4d02
parent0ab70da6b1e6dffbab0dc7fd6269d5fbd619e4fe
isl_union_map_is_subset: properly handle non-obviously empty subsets

If the first argument of isl_union_map_is_subset contains an empty
set in some space that is not present in the second argument,
then isl_union_map_is_subset would incorrectly draw the conclusion
that the first is not a subset of the second.

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
isl_union_map.c