[Bug rtl-optimization/64081] [5/6 Regression] r217827 prevents RTL loop unroll

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64081

--- Comment #22 from David Edelsohn <dje at gcc dot gnu.org> ---
We can try it again or I can try an additional bootstrap test with your patch.