[Bug tree-optimization/83914] [8 Regression] ice in vect_is_simple_use with -O3

[rsandifo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83914

--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Started with r256630 (so definitely mine)