[Bug tree-optimization/71084] [7 Regression] ICE in compute_dominance_frontiers_1 (cfganal.c:1302)

[ienkovich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71084

--- Comment #5 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> fwprop_init calcuates dominator info so it's likely df that runs cfg-cleanup
> and doesn't expect it to wreck dominator info.
> 
> Probably rightfully so.

So should we improve cse_cfg_altered  computation taking cfg_cleanup calls into
account or free dominance info in cfg_cleanup instead?