[Bug target/96787] rs6000 mcpu=power10 miscompiles libiberty htab_delete() causing bootstrap failure

[acsawdey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96787

--- Comment #3 from acsawdey at gcc dot gnu.org ---
Never mind that, all I'm seeing is the lack of save/restore of r2 in the
power10 version.