Comment 8 for bug 472056

I guess it would be possible for reload to split an insn in some circumstances, particularly when there's complex addressing modes and multiple registers dying within the insn.

As you know, I've been poking at range splitting and we might be able to model this case too. Right now I split based on unallocated pseudos and expect to split ranges based on pseudos getting the wrong kind of register in the future.

However, there's a couple areas were we still want to split ranges and we may be able to come up with a generic way to express the other ranges we want to split: