[Bug tree-optimization/114403] [14 regression] LLVM miscompiled with -O3 -march=znver2 -fno-vect-cost-model since r14-6822-g01f4251b8775c8

[tnfchris at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114403

--- Comment #22 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
note that due to the secondary exit the actual full vector iteration count is 8
scalar elements at VF=4 == 2.

And it's this boundary condition where we fail, since ceil (8/4) == 2. any
other value would have done the partial vector iteration.

Basically final_iter_may_be_partial ends up being ignored.