[Bug target/73650] powerpc: -mcpu=e500mc hits ICE: insn does not satisfy its constraints

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=73650

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It fails with -mtune={e55,e500mc,e5500,e6500} and works without it.