[Bug target/114302] [14 Regression] GCN regressions after: vect: Tighten vect_determine_precisions_from_range [PR113281]

[rsandifo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114302

--- Comment #1 from Richard Sandiford <rsandifo at gcc dot gnu.org> ---
The decision to stop narrowing division was deliberate, see the comments in
PR113281 for details.  Is the purpose of the test to check vectorisation
quality, or to check for the right ABI routines?