I've noticed the list of unused letters still list j, even when that
constraint letter is now the first letter of jr, jR, jm, j<, j>, jo, jV, jp,
ja, jb and jc constraints.
2023-11-13 Jakub Jelinek <jakub@redhat.com>
* config/i386/constraints.md: Remove j constraint letter from list of
unused letters.