[Bug tree-optimization/126570] [13/14/15/16/17 Regression] Wrong code in phiprop and scalar_storage_order

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126570

--- Comment #8 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Note phivn also needs to be updated to record REF_REVERSE_STORAGE_ORDER too.