isl_tab_basic_set_non_trivial_lexmin: postpone rollback until entering level
commitb20dcefcd958588ed32f34a9a3a12b382717cf69
authorSven Verdoolaege <sven.verdoolaege@gmail.com>
Sun, 20 Aug 2017 18:46:58 +0000 (20 20:46 +0200)
committerSven Verdoolaege <sven.verdoolaege@gmail.com>
Wed, 27 Sep 2017 07:23:34 +0000 (27 09:23 +0200)
treeb823537153428b31aa3c59d2d4413ba705e7b418
parent7bf9e6ef151ded87b3c4fba77a479a0c84fe7ad9
isl_tab_basic_set_non_trivial_lexmin: postpone rollback until entering level

This is a minor clean-up.
In the original code, the rollback was performed while leaving
the level that backtracks to the previous level.  Now it is
performed on entering that previous level.
This makes the code slightly easier to understand because
the rollback is now performed at the level that created the snapshot.

Signed-off-by: Sven Verdoolaege <sven.verdoolaege@gmail.com>
isl_tab_pip.c