[Bug tree-optimization/71357] [7 Regression] [graphite] ICE: verify_ssa failed (error: definition in block follows the use for SSA_NAME) w/ -O2 -floop-nest-optimize

[marxin at gcc dot gnu.org]

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.