[Bug tree-optimization/120661] [16 regression] compiler hang at -O{s,2,3} on x86_64-linux-gnu

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120661

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is in main, I only see one create_basic_block there during expansion (the
one added on edge from ENTRY to ENTRY->succ) and no remove_edge, no further
edges redirected or added.
Andrew, could you please have a look?
I see e.g.
recomputation attempt on edge 4->5 for _34 = _5 + 1;
message appearing 7000+ times after Ctrl-C very early, so ranger is looping
there.