[Bug rtl-optimization/65220] [4.8/4.9/5 Regression] integer division in stack alignment for VLA allocation

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65220

--- Comment #8 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
FWIW, patch succeeded as I posted it.  No regressions.  Fixes PR.