[Bug rtl-optimization/64081] [5/6/7 Regression] r217827 prevents RTL loop unroll

[aldyh at gcc dot gnu.org]

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

--- Comment #33 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Created attachment 40666
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40666&action=edit
patch attempting to bootstrap 219827 on gcc119 (AIX 7.2)