[Bug rtl-optimization/121648] [13/14/15/16 Regression] wrong code at -O{s, 2, 3} with "-fno-tree-loop-im -fno-gcse -fno-code-hoisting -fno-tree-fre -fno-tree-pre -fno-tree-dominator-opts" on x86_64-linux-gnu since r11-6188-g0b76990a9d75d9

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121648

--- Comment #5 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> My gut feeling is this is another REG_UNUSED issue but I could be wrong.
> The div/mod here is an important.

It used DF before r11-6188-g0b76990a9d75d9, so it might be exposing another
pass not keeping notes up to date.