[Bug other/30920] Incorrect splaying that fails to assure the caching property

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30920

--- Comment #8 from Richard Sandiford <rsandifo at gcc dot gnu.org> ---
The patch in comment 7 is just one step.