[Bug tree-optimization/78847] pointer arithmetic from c++ ranged-based for loop not optimized

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78847

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Actually disabling reassoc is enough to "fix" it, the patch itself is not
needed,
fixed by VRP then (which also folds stmts and knows the &MEM trick).