isl_map_simplify.c: update_ineq: take into account tableau may be empty
commitc85043a49c827750c0c9efc9b00d18c5d667627f
authorSven Verdoolaege <skimo@kotnet.org>
Sat, 20 Jun 2015 16:34:41 +0000 (20 18:34 +0200)
committerSven Verdoolaege <skimo@kotnet.org>
Wed, 29 Jul 2015 15:29:33 +0000 (29 17:29 +0200)
tree1edcb64aad68e15257513d172a4af8d0f1dfed7c
parentd77c620e7fb185fe0107dc788e3c36b23fb6bfbf
isl_map_simplify.c: update_ineq: take into account tableau may be empty

Currently, uset_gist computes the affine hull of the intersection
of the input with the context and this affine hull is tested for emptiness.
This means that the tableau constructed for identifying redundant constraints
can never be empty.  However, in a future commit, this intersection
will no longer be computed.  update_ineq therefore needs to take
into account that the tableau may be empty.

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