https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113822
Bug ID: 113822 Summary: aarch64_evpc_reencode could/should use new_shrunk_vector instead of manually doing it Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: internal-improvement Severity: enhancement Priority: P3 Component: target Assignee: pinskia at gcc dot gnu.org Reporter: pinskia at gcc dot gnu.org Target Milestone: --- Target: aarch64 The current code does: ``` /* Convert the perm constant if we can. Require even, odd as the pairs. */ for (unsigned int i = 0; i < nelt; i += 2) { poly_int64 elt0 = d->perm[i]; poly_int64 elt1 = d->perm[i + 1]; poly_int64 newelt; if (!multiple_p (elt0, 2, &newelt) || maybe_ne (elt0 + 1, elt1)) return false; newpermconst.quick_push (newelt.to_constant ()); } newpermconst.finalize (); ``` But that is just: ``` vec_perm_indices newpermindices; if (!newpermindices.new_shrunk_vector(d->perm, 2)) return false; ... newd.perm.new_vector (newpermindices.encoding (), d.one_vector_p ? 1 : 2, newpermindices.nelts_per_input ()); ``` Filing so I remember to make this change. Note I noticed this while implementing V2HI/V4QI support.