https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71357
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
It disappeared in r237527:
* g++.dg/vect/pr36648.cc: Disable cunrolli
* tree-ssa-loop-ivcanon.c (tree_estimate_loop_size): Fix estimation
of comparsions in the last iteration.
Which is a change in heuristics, thus I guess it's still latent even on trunk.
Probably changing iteration space in the test-case would re-trigger the issue.
