[Bug tree-optimization/68756] [6 Regression] ICE w/ -O1 -floop-nest-optimize and isl 0.15: isl-0.15/isl_id.c:213: unable to find id

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68756

--- Comment #6 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to vries from comment #5)
> Failure no longer reproducible after r232812, "new scop schedule for
> isl-0.15"

There are four snippets in this PR. All except the first one (snippet 1 from
#c0) are still reproducible w/ gcc-6.0.0-alpha20160403.