[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 #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
[ i have a patch, it is bootstrapping+checking ]
[ the revision in #c4 is a red herring ]

Yeah, single_set holds for that, and LRA then treats it as a reg-reg
move (because that is what the single set is), never looking at the
other constraints.