[Bug tree-optimization/121370] [13/14/15/16 regression] wrong code at -O{s,2,3} on x86_64-linux-gnu since r0-123105

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121370

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
most of the time such things happen because of failed reset of niter info.