[Bug tree-optimization/91699] [10 Regression] Bogus warnings with -O3 -flto after revision r274997

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91699

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
NOTE: the test passes without -flto, but fails with (although it's not shown in
the options summary)