[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

[vries at gcc dot gnu.org]

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

--- Comment #7 from vries at gcc dot gnu.org ---
(In reply to Arseny Solokha from comment #6)
> (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.

Sorry for being sloppy in formulation.

So, the first snippet is no longer reproducible.

The second snippet still reproduces with the same symptom and backtrace.

The third and fourth longer reproduce as before, but look like duplicates of PR
69728 - '[6 Regression] internal compiler error: in outer_projection_mupa, at
graphite-sese-to-poly.c:1175'