[Bug tree-optimization/91240] [8/9/10 Regression] Wrong code with -O3 due to unroll and jam pass

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91240

--- Comment #3 from Michael Matz <matz at gcc dot gnu.org> ---
Also fixed by the patch at PR90796.