WORD_REGISTER_OPERATIONS/LOAD_EXTEND_OP

[Joern Rennecke]

> Hmm?  You mean if it sees a HImode operation it should widen it to SImode?
> But if WORD_REGISTER_OPERATIONS is defined, we won't even see HImode
> operations because the machine doesn't define patterns for them, right?

There is no rule that says that smaller-than-word operations are not to have
patterns on a WORD_REGISTER_OPERATIONS machine.  And in fact, there are a
number of such patterns in existing ports.